Question: when did roger federer win his first major
[{'answer': '2004', 'provenance': [{'wikipedia_id': '262376', 'title': 'Roger Federer', 'start_paragraph_id': 12, 'start_character': 10, 'end_paragraph_id': 12, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Personal life.:Philanthropy and outreach.\n'}]}, {'provenance': [{'wikipedia_id': '262376', 'title': 'Roger Federer', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 446, 'bleu_score': 0.9562104553719301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7962427193542532512}, 'section': 'Section::::Tennis career.:2004: Imposing dominance.\n'}]}]