Question: who wrote the song leader of the pack
[{'answer': 'Jeff Barry', 'provenance': [{'wikipedia_id': '5498218', 'title': 'Leader of the Pack', 'start_paragraph_id': 1, 'start_character': 66, 'end_paragraph_id': 1, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ellie Greenwich', 'provenance': [{'wikipedia_id': '5498218', 'title': 'Leader of the Pack', 'start_paragraph_id': 1, 'start_character': 82, 'end_paragraph_id': 1, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "George `` Shadow '' Morton"}]