Question: when did david beckham start playing professional football
[{'answer': '23 January 1993', 'provenance': [{'wikipedia_id': '8618', 'title': 'David Beckham', 'start_paragraph_id': 11, 'start_character': 778, 'end_paragraph_id': 11, 'end_character': 793, 'bleu_score': 1.0, 'section': 'Section::::Club career.:Manchester United.:1991–1994: Youth and early career.\n'}]}, {'provenance': [{'wikipedia_id': '8618', 'title': 'David Beckham', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 793, 'bleu_score': 0.8675351052986291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11889089795626964902}, 'section': 'Section::::Club career.:Manchester United.:1991–1994: Youth and early career.\n'}]}]