Question: what is the role of a number 9 in football
[{'answer': 'centre forwards or strikers', 'provenance': [{'wikipedia_id': '20968810', 'title': 'Squad number (association football)', 'start_paragraph_id': 3, 'start_character': 514, 'end_paragraph_id': 3, 'end_character': 541, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20968810', 'title': 'Squad number (association football)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 649, 'bleu_score': 0.982060959997838, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7338844477935223373}, 'section': 'Section::::Abstract.'}]}]