Question: when is the start of pba commissioner's cup 2018
[{'answer': 'April 22 , 2018'}, {'provenance': [{'wikipedia_id': '56612598', 'title': "2018 PBA Commissioner's Cup", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 326, 'bleu_score': 0.8358213710926451, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 892693098397623162}, 'section': 'Section::::Abstract.'}]}]