Question: who composed the music for the first three harry potter films
[{'answer': 'John Williams', 'provenance': [{'wikipedia_id': '3063165', 'title': 'Music of the Harry Potter films', 'start_paragraph_id': 1, 'start_character': 193, 'end_paragraph_id': 1, 'end_character': 206, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]