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: 13113502
+    num_examples: 3568
+  - name: validation
+    num_bytes: 1478861
+    num_examples: 411
+  - name: test
+    num_bytes: 2197300
+    num_examples: 480
+  download_size: 8317119
+  dataset_size: 16789663
+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 sha256:1d4361d36cd7c3d9da49a05c10dc8c37c3cf032c6e4346411481aa534a9a128b
+size 1087845

data/train-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:8b6f1b346b4ff10486e1afae9a000dacd799dd3a533baddbae79188fd70ed65d
+size 6484808

data/validation-00000-of-00001.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:565daf7faec78e1e724d33b64369fc50a20204cf976724b89bb4957499fa99db
+size 744466