Question: who sang the theme song from the movie love story
[{'answer': 'Henry Mancini', 'provenance': [{'wikipedia_id': '7725180', 'title': '(Where Do I Begin?) Love Story', 'start_paragraph_id': 4, 'start_character': 101, 'end_paragraph_id': 4, 'end_character': 114, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '7725180', 'title': '(Where Do I Begin?) Love Story', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 818, 'bleu_score': 0.9626201417602621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7351802868158006045}, 'section': 'Section::::History.\n'}]}]