Question: when did batman vs superman come to theaters
[{'answer': 'March 25 , 2016', 'provenance': [{'wikipedia_id': '2619910', 'title': 'Batman v Superman: Dawn of Justice', 'start_paragraph_id': 56, 'start_character': 451, 'end_paragraph_id': 56, 'end_character': 466, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '2619910', 'title': 'Batman v Superman: Dawn of Justice', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 936, 'bleu_score': 0.7789911181621231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8316715687291176446}, 'section': 'Section::::Abstract.'}]}]