Backfill masks: train-patch00-003.parquet (+15574)

data/train-patch00-003.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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-size 121174641
+oid sha256:6d46d1470129306cb32ac4765f82f49a4dd232feb3679bd7e2e819aa21b9e098
+size 124551335