Question: guardians of the galaxy cast gamora's sister
[{'answer': 'Karen Gillan', 'provenance': [{'wikipedia_id': '36450985', 'title': 'Guardians of the Galaxy (film)', 'start_paragraph_id': 1, 'start_character': 582, 'end_paragraph_id': 1, 'end_character': 594, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36450985', 'title': 'Guardians of the Galaxy (film)', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 830, 'bleu_score': 0.9870543337942441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4968307957405053765}, 'section': 'Section::::Cast.\n'}]}]