Question: when is the world day of music celebrated
[{'answer': 'on 21 June', 'provenance': [{'wikipedia_id': '745073', 'title': 'Fête de la Musique', 'start_paragraph_id': 1, 'start_character': 143, 'end_paragraph_id': 1, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '745073', 'title': 'Fête de la Musique', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 382, 'bleu_score': 0.9492177523638841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8921147667615438557}, 'section': 'Section::::Abstract.'}]}]