Question: when is the last nba game of the regular season
[{'answer': 'April 11 , 2018', 'provenance': [{'wikipedia_id': '53555999', 'title': '2017–18 NBA season', 'start_paragraph_id': 36, 'start_character': 58, 'end_paragraph_id': 36, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Regular season.\n'}]}, {'provenance': [{'wikipedia_id': '53555999', 'title': '2017–18 NBA season', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 787, 'bleu_score': 0.8250752843650611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14639559667506014265}, 'section': 'Section::::Abstract.'}]}]