Add README for proofnet-v3-lean4 (with header_no_import).

README.md

@@ -1,36 +1,9 @@
----
-dataset_info:
-  features:
-  - name: name
-    dtype: string
-  - name: split
-    dtype: string
-  - name: informal_prefix
-    dtype: string
-  - name: formal_statement
-    dtype: string
-  - name: goal
-    dtype: string
-  - name: header
-    dtype: string
-  - name: nl_statement
-    dtype: string
-  - name: header_no_import
-    dtype: string
-  splits:
-  - name: validation
-    num_bytes: 143705.23243243244
-    num_examples: 182
-  - name: test
-    num_bytes: 144887.79032258064
-    num_examples: 183
-  download_size: 123797
-  dataset_size: 288593.0227550131
-configs:
-- config_name: default
-  data_files:
-  - split: validation
-    path: data/validation-*
-  - split: test
-    path: data/test-*
----
+# ProofNet Lean4 v3
+
+This dataset is based on `proofnet-v2-lean4` but **removes** any entries
+that caused Lean 4 syntax/parse errors. We also introduce a new field
+**`header_no_import`** that removes `"import Mathlib"`.
+
+**Splits**: `validation` and `test`.
+
+Enjoy!