Question: who is the lead singer of canned heat
[{'answer': 'Alan Christie Wilson', 'provenance': [{'wikipedia_id': '5312536', 'title': 'Alan Wilson (musician)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5312536', 'title': 'Alan Wilson (musician)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 422, 'bleu_score': 0.68142924376628, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12820734351160119876}, 'section': 'Section::::Abstract.'}]}]