Question: who plays thor sister in the new movie
[{'answer': 'Cate Blanchett', 'provenance': [{'wikipedia_id': '41974555', 'title': 'Thor: Ragnarok', 'start_paragraph_id': 1, 'start_character': 478, 'end_paragraph_id': 1, 'end_character': 492, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41974555', 'title': 'Thor: Ragnarok', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 1215, 'bleu_score': 0.9869695925539371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4809708939638436341}, 'section': 'Section::::Cast.\n'}]}]