Question: what is the name of thor s hammer
[{'answer': 'Mjölnir', 'provenance': [{'wikipedia_id': '221613', 'title': 'Mjölnir', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '221613', 'title': 'Mjölnir', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 499, 'bleu_score': 0.7420281848325051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16338137646899317403}, 'section': 'Section::::Abstract.'}]}]