Question: when did cristiano ronaldo go to manchester united
[{'answer': 'at age 18 in 2003', 'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'start_paragraph_id': 2, 'start_character': 252, 'end_paragraph_id': 2, 'end_character': 269, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '2003', 'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'start_paragraph_id': 2, 'start_character': 265, 'end_paragraph_id': 2, 'end_character': 269, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 840, 'bleu_score': 0.9337430463484521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4819085354848044532}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['before signing with Manchester United at age 18 in 2003', 'Born and raised on the Portuguese island of Madeira, Ronaldo was diagnosed with a racing heart at age 15. He underwent an operation to treat his condition, and began his senior club career playing for Sporting CP, before signing with Manchester United at age 18 in 2003.', "Born and raised on the Portuguese island of Madeira, Ronaldo was diagnosed with a racing heart at age 15. He underwent an operation to treat his condition, and began his senior club career playing for Sporting CP, before signing with Manchester United at age 18 in 2003. After winning his first trophy in England, the FA Cup, during his first season there, he helped United win three successive Premier League titles, a UEFA Champions League title, and a FIFA Club World Cup. By age 22, he had received Ballon d'Or and FIFA World Player of the Year nominations and at age 23, he won his first Ballon d'Or and FIFA World Player of the Year awards. In 2009, Ronaldo was the subject of the most expensive association football transfer at the time when he moved from Manchester United to Real Madrid in a transfer worth 94\xa0million (£80\xa0million)."]}}]}, {'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'section': 'Section::::Club career.:Sporting CP.\n', 'start_paragraph_id': 12, 'end_paragraph_id': 12, 'meta': {'evidence_span': ['Arsenal\'s grounds in November to discuss a possible transfer. Manchester United manager Alex Ferguson, however, determined to acquire Ronaldo on a permanent move urgently, after Sporting defeated United 31 at the inauguration of the Estádio José Alvalade in August 2003. Initially, United had just planned to sign Ronaldo and then loan him back to Sporting for a year. Having been impressed by him, however, the Manchester United players urged Ferguson to sign him. After the game, Ferguson agreed to pay Sporting £12.24 million for what he considered to be "one of the most exciting young players" he had ever seen. A decade after his departure from the club, in April 2013,', 'Arsenal\'s grounds in November to discuss a possible transfer. Manchester United manager Alex Ferguson, however, determined to acquire Ronaldo on a permanent move urgently, after Sporting defeated United 31 at the inauguration of the Estádio José Alvalade in August 2003. Initially, United had just planned to sign Ronaldo and then loan him back to Sporting for a year. Having been impressed by him, however, the Manchester United players urged Ferguson to sign him. After the game, Ferguson agreed to pay Sporting £12.24 million for what he considered to be "one of the most exciting young players" he had ever seen. A decade after his departure from the club, in April 2013, Sporting honoured Ronaldo by selecting him to become their 100,000th member.']}}]}]