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 [
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 ],
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  "join-act-mooc",
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 ],
 [
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
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 ],
 [
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 ],
 [
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
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 ],
 [
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 ],
 [
  "join-act-mooc",
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 ],
 [
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 ],
 [
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 ],
 [
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 [
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 [
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 [
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 ],
 [
  "join-act-mooc",
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 ],
 [
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
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 ],
 [
  "join-act-mooc",
  "student-time-until-next-interaction"
 ],
 [
  "join-act-mooc",
  "student-top-feature0"
 ],
 [
  "join-amazon-arts-crafts",
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 ],
 [
  "join-amazon-arts-crafts",
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 ],
 [
  "join-amazon-arts-crafts",
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 ],
 [
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 ],
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 ],
 [
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 ],
 [
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 ],
 [
  "join-amazon-arts-crafts",
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
 [
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 ],
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 ],
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 ],
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 ],
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  "join-amazon-arts-crafts",
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 ],
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 ],
 [
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 ],
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 ],
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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  "join-amazon-arts-crafts",
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 ],
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 ],
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  "join-amazon-arts-crafts",
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 ],
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 ],
 [
  "join-amazon-arts-crafts",
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 ],
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
  "product-high-rating"
 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
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  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-automotive",
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 ],
 [
  "join-amazon-beauty",
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 ],
 [
  "join-amazon-beauty",
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 ],
 [
  "join-amazon-beauty",
  "product-high-rating"
 ],
 [
  "join-amazon-beauty",
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 ],
 [
  "join-amazon-beauty",
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 ],
 [
  "join-amazon-beauty",
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 ],
 [
  "join-amazon-beauty",
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 ],
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  "join-amazon-beauty",
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 ],
 [
  "join-amazon-beauty",
  "product-top-rated"
 ],
 [
  "join-amazon-beauty",
  "reviewer-active"
 ],
 [
  "join-amazon-beauty",
  "reviewer-return"
 ],
 [
  "join-amazon-cds-vinyl",
  "album-high-rating"
 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
  "album-rating-trend"
 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
  "reviewer-active"
 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cds-vinyl",
  "reviewer-churn"
 ],
 [
  "join-amazon-cds-vinyl",
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 ],
 [
  "join-amazon-cell-phones",
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 ],
 [
  "join-amazon-cell-phones",
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 ],
 [
  "join-amazon-cell-phones",
  "product-high-rating"
 ],
 [
  "join-amazon-cell-phones",
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 ],
 [
  "join-amazon-cell-phones",
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 ],
 [
  "join-amazon-cell-phones",
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 ],
 [
  "join-amazon-cell-phones",
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 ],
 [
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 ],
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  "join-amazon-cell-phones",
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 ],
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  "join-amazon-cell-phones",
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 ],
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 ],
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 ],
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  "join-amazon-cell-phones",
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 ],
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 ],
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 ],
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 ],
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  "join-amazon-cell-phones",
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 ],
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 ],
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 ],
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  "join-amazon-cell-phones",
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 ],
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  "join-amazon-cell-phones",
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 ],
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  "join-amazon-cell-phones",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
  "product-long-review-rare"
 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
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  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
  "reviewer-high-vote-post"
 ],
 [
  "join-amazon-clothing",
  "reviewer-multi-verified-burst"
 ],
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  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
  "reviewer-return"
 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-clothing",
  "reviewer-voted-review-rare"
 ],
 [
  "join-amazon-clothing",
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 ],
 [
  "join-amazon-digital-music",
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 ],
 [
  "join-amazon-digital-music",
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 ],
 [
  "join-amazon-digital-music",
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 ],
 [
  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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 ],
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 ],
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 ],
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  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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 ],
 [
  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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 ],
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  "join-amazon-digital-music",
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 ],
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 ],
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 ],
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  "join-amazon-electronics",
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 ],
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  "join-amazon-electronics",
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 ],
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 ],
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 ],
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 ],
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  "join-amazon-electronics",
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 ],
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  "join-amazon-electronics",
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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 ],
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  "join-tpch",
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  "join-tpch",
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  "join-tpch",
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  "join-tpch",
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  "join-tpch",
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  "join-tpch",
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  "join-tpch",
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]