Update Integration.py

Integration.py

@@ -556,11 +556,11 @@ class Euro2020Dataset(GeneratorBasedBuilder):
             for id, row in enumerate(reader):
 
                 match_event_str = row["MatchEvent"]
-                match_event_replaced = match_event_str.replace("'", '"')
+                match_event_replaced = match_event_str.replace({"'": '"', ": nan": ": null"})
                 match_event = json.loads(match_event_replaced)
                 
                 team_linup_str = row["TeamLineUps"]
-                team_linup_replaced = team_linup_str.replace("'", '"')
+                team_linup_replaced = team_linup_str.replace({"'": '"', ": nan": ": null"})
                 team_linup = json.loads(team_linup_replaced)
                 
                 yield id, {