Question: when did the first pairing of music and film take place
[{'answer': '1900', 'provenance': [{'wikipedia_id': '70318', 'title': 'Sound film', 'start_paragraph_id': 1, 'start_character': 212, 'end_paragraph_id': 1, 'end_character': 216, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '70318', 'title': 'Sound film', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1576, 'bleu_score': 0.9918862421353071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4161615988389872450}, 'section': 'Section::::History.:Early steps.\n'}]}]