Question: when was guardians of the galaxy 2 released
[{'answer': 'May 5 , 2017', 'provenance': [{'wikipedia_id': '43402974', 'title': 'Guardians of the Galaxy Vol. 2', 'start_paragraph_id': 28, 'start_character': 283, 'end_paragraph_id': 28, 'end_character': 295, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}, {'provenance': [{'wikipedia_id': '43402974', 'title': 'Guardians of the Galaxy Vol. 2', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 642, 'bleu_score': 0.6694072401716621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8619478842745444232}, 'section': 'Section::::Abstract.'}]}]