Question: when did messi started playing for barca first team
[{'answer': '16 November 2003', 'provenance': [{'wikipedia_id': '2150841', 'title': 'Lionel Messi', 'start_paragraph_id': 14, 'start_character': 161, 'end_paragraph_id': 14, 'end_character': 177, 'bleu_score': 1.0, 'section': 'Section::::Club career.:Barcelona.:2003–05: Rise to the first team.\n'}]}, {'provenance': [{'wikipedia_id': '2150841', 'title': 'Lionel Messi', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 918, 'bleu_score': 0.5406059810970361, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14044132344288645023}, 'section': 'Section::::Club career.:Barcelona.:2003–05: Rise to the first team.\n'}]}]