Question: who played thor's mother in marvel films
[{'answer': 'Rene Russo', 'provenance': [{'wikipedia_id': '12673434', 'title': 'Thor (film)', 'start_paragraph_id': 1, 'start_character': 519, 'end_paragraph_id': 1, 'end_character': 529, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12673434', 'title': 'Thor (film)', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 298, 'bleu_score': 0.7895155353889061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5588469153648821843}, 'section': 'Section::::Cast.\n'}]}]