Add mutiple answer dataset

klue-mrc.py

@@ -80,10 +80,16 @@ class KoreanNewspaper(datasets.GeneratorBasedBuilder):
                 question = q['question']
 
                 answer_key = 'answers' if len(q['answers']) > 0 else 'plausible_answers'            
-                answer = q[answer_key][0]
-                answer_text = answer['text']
-                answer_start = answer['answer_start']
-                answer_data = {'answer_start' : [answer_start], 'text': [answer_text]}
+                answer = q[answer_key]
+
+                answer_text_list = []
+                answer_start_list = []
+
+                for ans in answer :
+                    answer_text_list.append(ans['text'])
+                    answer_start_list.append(ans['answer_start'])
+
+                answer_data = {'text' : answer_text_list, 'answer_start' : answer_start_list}
                 guid = q['guid']
 
                 yield key, {