Question: who is the lead singer of smashing pumpkins
[{'answer': 'William Patrick Corgan Jr.', 'provenance': [{'wikipedia_id': '183773', 'title': 'Billy Corgan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '183773', 'title': 'Billy Corgan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 723, 'bleu_score': 0.8811568016336201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3372824766849733353}, 'section': 'Section::::Abstract.'}]}]