Question: who was the lead singer of the atlanta rhythm section
[{'answer': 'Rodney Justo', 'provenance': [{'wikipedia_id': '1102935', 'title': 'Atlanta Rhythm Section', 'start_paragraph_id': 1, 'start_character': 85, 'end_paragraph_id': 1, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]