Question: when did the first captain america come out
[{'answer': 'December 20 , 1940', 'provenance': [{'wikipedia_id': '7729', 'title': 'Captain America', 'start_paragraph_id': 12, 'start_character': 63, 'end_paragraph_id': 12, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Publication history.:Golden Age.\n'}]}, {'provenance': [{'wikipedia_id': '7729', 'title': 'Captain America', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 730, 'bleu_score': 0.983672097934538, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10450181712679036540}, 'section': 'Section::::Publication history.:Golden Age.\n'}]}]