Question: when did season 2 of luke cage start
[{'answer': 'June 21 , 2018', 'provenance': [{'wikipedia_id': '52476225', 'title': 'Luke Cage (season 2)', 'start_paragraph_id': 76, 'start_character': 274, 'end_paragraph_id': 76, 'end_character': 288, 'bleu_score': 1.0, 'section': 'Section::::Release.:Marketing.\n'}]}, {'provenance': [{'wikipedia_id': '52476225', 'title': 'Luke Cage (season 2)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 328, 'bleu_score': 0.963949056609222, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5374927447973790952}, 'section': 'Section::::Abstract.'}]}]