Question: when is the last time yankees won world series
[{'answer': '2009', 'provenance': [{'wikipedia_id': '4848143', 'title': 'New York Yankees', 'start_paragraph_id': 2, 'start_character': 472, 'end_paragraph_id': 2, 'end_character': 476, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4848143', 'title': 'New York Yankees', 'start_paragraph_id': 101, 'start_character': 30, 'end_paragraph_id': 101, 'end_character': 203, 'bleu_score': 0.600456107598074, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8422455938736277115}, 'section': 'Section::::World Series championships.\n'}]}]