Question: how long in seconds is a shot clock in the nba
[{'answer': '24', 'provenance': [{'wikipedia_id': '1002256', 'title': 'Shot clock', 'start_paragraph_id': 1, 'start_character': 407, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]