add Variants V2 dataset

README.md

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+---
+dataset_info:
+  features:
+  - name: words
+    dtype: string
+  - name: labels
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 2419523
+    num_examples: 178321
+  - name: validation
+    num_bytes: 532929
+    num_examples: 39277
+  download_size: 927758
+  dataset_size: 2952452
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train-*
+  - split: validation
+    path: data/validation-*
+---

data/train-00000-of-00001.parquet

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+oid sha256:a6f5182ccd9330a73beb29d67dcf5f55a68509d48aae6c62d2551ae29e821be3
+size 748413

data/validation-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:544a294b40ff755f8a4c28a3e1ec6f074fd8b7a252d188634d8706a328eef9b0
+size 179345