Question: who sings the theme tune to one foot in the grave
[{'answer': 'Eric Idle', 'provenance': [{'wikipedia_id': '22626', 'title': 'One Foot in the Grave', 'start_paragraph_id': 41, 'start_character': 73, 'end_paragraph_id': 41, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Music.\n'}]}]