Question: when was the first batman comic book published
[{'answer': 'Spring 1940', 'provenance': [{'wikipedia_id': '3622838', 'title': 'Batman (comic book)', 'start_paragraph_id': 1, 'start_character': 308, 'end_paragraph_id': 1, 'end_character': 319, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3622838', 'title': 'Batman (comic book)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 445, 'bleu_score': 0.9735040436119741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6350925202218343333}, 'section': 'Section::::Abstract.'}]}]