Question: when did the movie black panthers come out
[{'answer': 'February 16 , 2018', 'provenance': [{'wikipedia_id': '41677925', 'title': 'Black Panther (film)', 'start_paragraph_id': 31, 'start_character': 881, 'end_paragraph_id': 31, 'end_character': 899, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}]