Question: when does brawl stars come out on ios
[{'answer': 'June 15 , 2017', 'provenance': [{'wikipedia_id': '54330116', 'title': 'Brawl Stars', 'start_paragraph_id': 8, 'start_character': 158, 'end_paragraph_id': 8, 'end_character': 172, 'bleu_score': 1.0, 'section': 'Section::::Development and release.\n'}]}]