Question: when did wayne rooney sign for man utd
[{'answer': 'August 2004', 'provenance': [{'wikipedia_id': '199445', 'title': 'Wayne Rooney', 'start_paragraph_id': 18, 'start_character': 39, 'end_paragraph_id': 18, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Club career.:Manchester United.:2004–05 season.\n'}]}, {'provenance': [{'wikipedia_id': '199445', 'title': 'Wayne Rooney', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 624, 'bleu_score': 0.9601968849001611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8917759845653886633}, 'section': 'Section::::Club career.:Manchester United.:2004–05 season.\n'}]}]