Question: who plays peter on guardians of the galaxy
[{'answer': 'Chris Pratt', 'provenance': [{'wikipedia_id': '36450985', 'title': 'Guardians of the Galaxy (film)', 'start_paragraph_id': 1, 'start_character': 447, 'end_paragraph_id': 1, 'end_character': 458, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36450985', 'title': 'Guardians of the Galaxy (film)', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 1571, 'bleu_score': 0.963633385674531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8081587999785190578}, 'section': 'Section::::Cast.\n'}]}]