Question: who is the lead singer of the spin doctors
[{'answer': 'Chris Barron', 'provenance': [{'wikipedia_id': '175895', 'title': 'Spin Doctors', 'start_paragraph_id': 2, 'start_character': 27, 'end_paragraph_id': 2, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '175895', 'title': 'Spin Doctors', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 140, 'bleu_score': 0.647285941823006, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3889983075606367317}, 'section': 'Section::::Abstract.'}]}]