Convert dataset to Parquet

Convert dataset to Parquet.

2/test-00000-of-00001.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:89600477f3f9df46272601cdf1d4acdf96af62cdaacbfc846630966b96cad6b5
+size 32693

2/train-00000-of-00001.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7725b02743961f02606bd2e167405cce18f1442f48b54d60ad069daefb3b9846
+size 1142

README.md

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+---
+dataset_info:
+  config_name: '2'
+  features:
+  - name: input
+    dtype: string
+  - name: output
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 141
+    num_examples: 3
+  - name: test
+    num_bytes: 76944
+    num_examples: 500
+  download_size: 33835
+  dataset_size: 77085
+configs:
+- config_name: '2'
+  data_files:
+  - split: train
+    path: 2/train-*
+  - split: test
+    path: 2/test-*
+---