Question: who sang the theme song for the fall guy
[{'answer': 'Lee Majors', 'provenance': [{'wikipedia_id': '1276221', 'title': 'The Fall Guy', 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]