Question: who is known as the man of steel
[{'answer': 'Superman', 'provenance': [{'wikipedia_id': '31316475', 'title': 'Man of Steel (film)', 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31316475', 'title': 'Man of Steel (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 833, 'bleu_score': 0.816941463895257, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11076962928321229420}, 'section': 'Section::::Abstract.'}]}]