Question: what river flows through charleston west virginia’s capital
[{'answer': 'Kanawha River', 'provenance': [{'wikipedia_id': '57861', 'title': 'Charleston, West Virginia', 'start_paragraph_id': 84, 'start_character': 616, 'end_paragraph_id': 84, 'end_character': 629, 'bleu_score': 1.0, 'section': 'Section::::History.:Beginnings.\n'}]}, {'answer': 'Elk', 'provenance': [{'wikipedia_id': '57861', 'title': 'Charleston, West Virginia', 'start_paragraph_id': 1, 'start_character': 127, 'end_paragraph_id': 1, 'end_character': 130, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Kanawha', 'provenance': [{'wikipedia_id': '57861', 'title': 'Charleston, West Virginia', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Elk and Kanawha Rivers', 'provenance': [{'wikipedia_id': '57861', 'title': 'Charleston, West Virginia', 'start_paragraph_id': 1, 'start_character': 120, 'end_paragraph_id': 1, 'end_character': 142, 'bleu_score': 0.668740304976422, 'section': 'Section::::Abstract.'}]}, {'answer': 'the confluence of the Elk and Kanawha Rivers'}, {'provenance': [{'wikipedia_id': '57861', 'title': 'Charleston, West Virginia', 'start_paragraph_id': 345, 'start_character': 0, 'end_paragraph_id': 345, 'end_character': 171, 'bleu_score': 0.9271474438253491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3184909300703031278}, 'section': 'Section::::Infrastructure.:River.\n'}]}, {'provenance': [{'wikipedia_id': '57861', 'title': 'Charleston, West Virginia', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Charleston is the center of government, commerce, and industry for Kanawha County, of which it is the county seat.', 'Charleston is the most populous city in, and the capital of, the U.S. state of West Virginia. Located at the confluence of the Elk and Kanawha rivers, the city had a population of 51,400 at the 2010 census and an estimated population of 47,215 in 2018. The Charleston metropolitan area as a whole had an estimated 211,037 residents in 2018. Charleston is the center of government, commerce, and industry for Kanawha County, of which it is the county seat.\rhighlight sentence(s) containing evidence, not only the answer', 'Located at the confluence of the Elk and Kanawha rivers, the city had a population of 51,400 at the 2010 census and an estimated population of 47,215 in 2018.']}}]}, {'provenance': [{'wikipedia_id': '19255134', 'title': 'Charleston High School (West Virginia)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['harleston High School is a former high school, which was closed in 1989, in Kanawha County, West Virginia. Its final location is where CAMC General Hospital is now located in downtown Charleston, West Virginia.', 'Charleston High School is a former high school, which was closed in 1989, in Kanawha County, West Virginia. Its final location is where CAMC General Hospital is now located in downtown Charleston, West Virginia. In 1989, Charleston High School and Stonewall Jackson High School consolidated to form Capital High School. There were three Mercer Schools. Mercer Academy was built in 1818 on Quarrier and Hale Streets. The second Mercer School, constructed in 1888, was on the site of where the last Charleston High building was built. This\rhighlight sentence(s) containing evidence, not only the answer']}}]}]