Question: when did the baltimore bullets move to washington
[{'answer': '1973', 'provenance': [{'wikipedia_id': '72858', 'title': 'Washington Wizards', 'start_paragraph_id': 2, 'start_character': 286, 'end_paragraph_id': 2, 'end_character': 290, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '72858', 'title': 'Washington Wizards', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 505, 'bleu_score': 0.976043556018343, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4523322629129174329}, 'section': 'Section::::Abstract.'}]}]