Question: who played the actor thor in thor ragnarok
[{'answer': 'Chris Hemsworth', 'provenance': [{'wikipedia_id': '41974555', 'title': 'Thor: Ragnarok', 'start_paragraph_id': 1, 'start_character': 428, 'end_paragraph_id': 1, 'end_character': 443, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41974555', 'title': 'Thor: Ragnarok', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 705, 'bleu_score': 0.9236630865473301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6861217800586219342}, 'section': 'Section::::Abstract.'}]}]