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: 211560
+    num_examples: 500
+  - name: validation
+    num_bytes: 202446
+    num_examples: 500
+  - name: test
+    num_bytes: 337292
+    num_examples: 500
+  download_size: 472419
+  dataset_size: 751298
+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 sha256:5776ba5d864ec6d13ce82b5ecd7768bc7da12f4469f4de002421559d2b8bac48
+size 214786

data/train-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:715180d5b90822f0a334282bdb1b64951d7c326f7f84b5268960d73f0bd0255a
+size 130860

data/validation-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:9db7a4259a05aa012ad7926fa2675773c86897ccb379d975260a3d235f7de698
+size 126773