Question: how many draft picks are in the nfl draft
[{'answer': '256', 'provenance': [{'wikipedia_id': '51510880', 'title': '2018 NFL Draft', 'start_paragraph_id': 6, 'start_character': 38, 'end_paragraph_id': 6, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Early entrants.\n'}]}]