Question: who wrote the soundtrack for la la land
[{'answer': 'Justin Hurwitz', 'provenance': [{'wikipedia_id': '52726450', 'title': 'La La Land (soundtrack)', 'start_paragraph_id': 3, 'start_character': 71, 'end_paragraph_id': 3, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Composition.\n'}]}, {'provenance': [{'wikipedia_id': '52726450', 'title': 'La La Land (soundtrack)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 338, 'bleu_score': 0.6574997369845981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13180226365281215936}, 'section': 'Section::::Composition.\n'}]}]