Question: when did they start filming guardians of the galaxy
[{'answer': 'July 6 , 2013', 'provenance': [{'wikipedia_id': '36450985', 'title': 'Guardians of the Galaxy (film)', 'start_paragraph_id': 39, 'start_character': 35, 'end_paragraph_id': 39, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Production.:Filming.\n'}]}, {'provenance': [{'wikipedia_id': '36450985', 'title': 'Guardians of the Galaxy (film)', 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 1088, 'bleu_score': 0.9707668775736881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12349118940607307434}, 'section': 'Section::::Production.:Filming.\n'}]}]