fixed bug

mc4_legal.py

@@ -1,5 +1,5 @@
 """MC4_Legal"""
-
+import ast
 import json
 
 import datasets
@@ -111,7 +111,7 @@ class MC4Legal(datasets.GeneratorBasedBuilder):
                                     "index": example.get("index", ""),
                                     "url": example.get("url", ""),
                                     "timestamp": example.get("timestamp", ""),
-                                    "matches": example.get("matches", ""),
+                                    "matches": ast.literal_eval(example.get("matches", "")),
                                     "text": example.get("text", ""),
                                 }
                                 id_ += 1