Question: when did guardians of the galaxy2 come out
[{'answer': '2017', 'provenance': [{'wikipedia_id': '43402974', 'title': 'Guardians of the Galaxy Vol. 2', 'start_paragraph_id': 1, 'start_character': 36, 'end_paragraph_id': 1, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43402974', 'title': 'Guardians of the Galaxy Vol. 2', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 755, 'bleu_score': 0.9320794641443331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4347833375193543436}, 'section': 'Section::::Abstract.'}]}]