Question: what do dc stand for in washington dc
[{'answer': 'District of Columbia', 'provenance': [{'wikipedia_id': '108956', 'title': 'Washington, D.C.', 'start_paragraph_id': 1, 'start_character': 31, 'end_paragraph_id': 1, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '108956', 'title': 'Washington, D.C.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 154, 'bleu_score': 0.717188494414283, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1839766577171005933}, 'section': 'Section::::Abstract.'}]}]