Convert dataset to Parquet

Convert dataset to Parquet.

README.md

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+---
+dataset_info:
+  features:
+  - name: query
+    dtype: string
+  - name: answer
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 351662
+    num_examples: 490
+  - name: validation
+    num_bytes: 46009
+    num_examples: 63
+  - name: test
+    num_bytes: 28752
+    num_examples: 61
+  download_size: 230952
+  dataset_size: 426423
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train-*
+  - split: validation
+    path: data/validation-*
+  - split: test
+    path: data/test-*
+---

data/test-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:042df613b227460f6ce6523cf219121528cf2754f4fa8d0199e059daee84668c
+size 22690

data/train-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:c75b551c917fa76f71396b9843300b35265c84785822f38936eda5a1ab180609
+size 177742

data/validation-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:6596d8d11e2d695efddd42edfcd4497afbbdd280fda442c2c107c69f7b7c964d
+size 30520