make dataset type squad metric format

klue-mrc.py

@@ -34,8 +34,8 @@ class KoreanNewspaper(datasets.GeneratorBasedBuilder):
                     "question": datasets.Value("string"),
                     "answers":
                     {
-                        "answer_start" : datasets.Value("int32"),
-                        "text":datasets.Value("string")
+                        "answer_start" : datasets.Sequence(datasets.Value("int32")),
+                        "text":datasets.Sequence(datasets.Value("string"))
                     },
                     "guid":datasets.Value("string"),
 
@@ -83,7 +83,7 @@ class KoreanNewspaper(datasets.GeneratorBasedBuilder):
                 answer = q[answer_key][0]
                 answer_text = answer['text']
                 answer_start = answer['answer_start']
-                answer_data = {'answer_start' : answer_start, 'text': answer_text}
+                answer_data = {'answer_start' : [answer_start], 'text': [answer_text]}
                 guid = q['guid']
 
                 yield key, {