Question: who wrote the theme song to the titanic
[{'answer': 'composed by James Horner', 'provenance': [{'wikipedia_id': '923235', 'title': 'My Heart Will Go On', 'start_paragraph_id': 1, 'start_character': 354, 'end_paragraph_id': 1, 'end_character': 378, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'written by Will Jennings', 'provenance': [{'wikipedia_id': '923235', 'title': 'My Heart Will Go On', 'start_paragraph_id': 1, 'start_character': 396, 'end_paragraph_id': 1, 'end_character': 420, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '923235', 'title': 'My Heart Will Go On', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 502, 'bleu_score': 0.7368568661753331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9098159003043530194}, 'section': 'Section::::Abstract.'}]}]