Question: how many players on the line of scrimmage in american football
[{'answer': 'seven', 'provenance': [{'wikipedia_id': '10285', 'title': 'Eligible receiver', 'start_paragraph_id': 11, 'start_character': 150, 'end_paragraph_id': 11, 'end_character': 155, 'bleu_score': 1.0, 'section': 'Section::::Professional football.\n'}]}, {'answer': 'at least seven players', 'provenance': [{'wikipedia_id': '10285', 'title': 'Eligible receiver', 'start_paragraph_id': 11, 'start_character': 141, 'end_paragraph_id': 11, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Professional football.\n'}]}, {'answer': 'at least seven', 'provenance': [{'wikipedia_id': '10285', 'title': 'Eligible receiver', 'start_paragraph_id': 11, 'start_character': 141, 'end_paragraph_id': 11, 'end_character': 155, 'bleu_score': 1.0, 'section': 'Section::::Professional football.\n'}]}, {'provenance': [{'wikipedia_id': '10285', 'title': 'Eligible receiver', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 930, 'bleu_score': 0.9873810715615521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17880281795537974062}, 'section': 'Section::::Professional football.\n'}]}, {'provenance': [{'wikipedia_id': '10285', 'title': 'Eligible receiver', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17880281795537974062}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '49079889', 'title': 'National Football League uniform numbers', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["Players in the National Football League wear uniform numbers between 1 and 99, and no two players on a team may wear the same number on the field at the same time. Rules exist which tie a player's number to a specific range of numbers for their primary position. Additionally, rules exist which limit who may handle the ball on offense, generally players who are designated as offensive lineman, who wear numbers 50-79, are not allowed to handle the ball during a play from scrimmage, though they are allowed to do so if they report to the referee as playing out of position.", 'ers for their primary position. Additionally, rules exist which limit who may handle the ball on offense, generally players who are designated as offensive lineman, who wear numbers 50-79, are not allowed to handl']}}]}]