Question: who sang lead on oh what a night
[{'answer': 'Gerry Polci', 'provenance': [{'wikipedia_id': '2704334', 'title': 'December, 1963 (Oh, What a Night)', 'start_paragraph_id': 2, 'start_character': 26, 'end_paragraph_id': 2, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2704334', 'title': 'December, 1963 (Oh, What a Night)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 328, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9969201641874376366}, 'section': 'Section::::Abstract.'}]}]