Question: how many weeks are in the regular nfl season
[{'answer': '17 - week'}, {'provenance': [{'wikipedia_id': '7990664', 'title': 'NFL regular season', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1271, 'bleu_score': 0.8513390479489751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14542829063772193537}, 'section': 'Section::::Abstract.'}]}]