Question: how many jefferson counties are there in the us
[{'answer': 'twenty six', 'provenance': [{'wikipedia_id': '1260957', 'title': 'List of the most common U.S. county name etymologies', 'start_paragraph_id': 36, 'start_character': 21, 'end_paragraph_id': 36, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Jefferson County (26 counties).\n'}]}, {'provenance': [{'wikipedia_id': '1260957', 'title': 'List of the most common U.S. county name etymologies', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 186, 'bleu_score': 0.934334813046729, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6089074465418306915}, 'section': 'Section::::Jefferson County (26 counties).\n'}]}]