Add file with nesting two-level list structure

data/README.md

@@ -53,6 +53,7 @@
 | incorrect_map_schema.parquet | Contains a Map schema without explicitly required keys, produced by Presto. See [note](#incorrect-map-schema) |
 | column_chunk_key_value_metadata.parquet | two INT32 columns, one with column chunk key-value metadata {"foo": "bar", "thisiskeywithoutvalue": null} note that the second key "thisiskeywithoutvalue", does not have a value, but the value can be mapped to an empty string "" when read depending on the client |
 | sorting_columns.parquet | INT64 and BYTE_ARRAY columns with first column with nulls first and descending, second column with nulls last and ascending. This file contains two row groups with same data and sorting columns. |
+| old_list_structure.parquet | Single LIST<LIST<INT32>> column with legacy two-level list structure |
 
 TODO: Document what each file is in the table above.
 
@@ -143,6 +144,7 @@ The schema for the `*-dict-*-checksum.parquet` test files is:
  [ Column "long_field" [ Dict Page [bad crc] | Uncompressed PLAIN Contents ][ Page 0 [correct crc] | Uncompressed RLE_DICTIONARY Contents ]]
  [ Column "binary_field" [ Dict Page [bad crc] | Uncompressed PLAIN Contents ][ Page 0 [correct crc] | Uncompressed RLE_DICTIONARY Contents ]]
  ```
+
 ## Bloom Filter Files
 
 Bloom filter examples have been generated by parquet-mr.