Question: who was the star of the greatest american hero
[{'answer': 'William Theodore Katt', 'provenance': [{'wikipedia_id': '1142286', 'title': 'William Katt', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1142286', 'title': 'William Katt', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 602, 'bleu_score': 0.9097567789087431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1265879034931171491}, 'section': 'Section::::Abstract.'}]}]