Question: when did cristiano ronaldo started playing for portugal
[{'answer': 'August 2003', 'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'start_paragraph_id': 12, 'start_character': 197, 'end_paragraph_id': 12, 'end_character': 208, 'bleu_score': 1.0, 'section': 'Section::::Club career.:Sporting CP.\n'}]}, {'provenance': [{'wikipedia_id': '623737', 'title': 'Cristiano Ronaldo', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 740, 'bleu_score': 0.5531248324729651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7339560106208904208}, 'section': 'Section::::Abstract.'}]}]