Question: who wrote the music and lyrics for frozen
[{'answer': 'Robert Lopez', 'provenance': [{'wikipedia_id': '1604808', 'title': 'Robert Lopez', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1604808', 'title': 'Robert Lopez', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 486, 'bleu_score': 0.801398488265413, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12358183055008364455}, 'section': 'Section::::Abstract.'}]}]