Question: who wrote i write the songs david cassidy
[{'answer': 'Bruce Johnston', 'provenance': [{'wikipedia_id': '2704112', 'title': 'I Write the Songs', 'start_paragraph_id': 1, 'start_character': 67, 'end_paragraph_id': 1, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]