Question: when did andrews air force base become joint base andrews
[{'answer': '2009', 'provenance': [{'wikipedia_id': '38341689', 'title': 'Joint Base Andrews', 'start_paragraph_id': 1, 'start_character': 226, 'end_paragraph_id': 1, 'end_character': 230, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38341689', 'title': 'Joint Base Andrews', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 327, 'bleu_score': 0.9632870032952191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14381118206294765053}, 'section': 'Section::::Abstract.'}]}]