Question: when did zidane join real madrid as a coach
[{'answer': '2013', 'provenance': [{'wikipedia_id': '77880', 'title': 'Zinedine Zidane', 'start_paragraph_id': 24, 'start_character': 131, 'end_paragraph_id': 24, 'end_character': 135, 'bleu_score': 1.0, 'section': 'Section::::Club career.:Real Madrid.\n'}]}, {'provenance': [{'wikipedia_id': '77880', 'title': 'Zinedine Zidane', 'start_paragraph_id': 58, 'start_character': 0, 'end_paragraph_id': 58, 'end_character': 641, 'bleu_score': 0.9594798946546471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2901006117795162142}, 'section': 'Section::::Managerial career.\n'}]}]