Question: who does the voice of nelson on simpsons
[{'answer': 'Nancy Jean Cartwright', 'provenance': [{'wikipedia_id': '113158', 'title': 'Nancy Cartwright', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '113158', 'title': 'Nancy Cartwright', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 325, 'bleu_score': 0.9287747521948501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15257592098861546131}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '113158', 'title': 'Nancy Cartwright', 'section': 'Section::::Career.:"The Simpsons".\n', 'start_paragraph_id': 18, 'end_paragraph_id': 18, 'meta': {'evidence_span': ['Cartwright voices several other characters on the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, and Database. She first voiced Nelson in the episode "Bart the General" (season one, 1990). The character was to be voiced by Dana Hill, but Hill missed the recording session and Cartwright was given the role. She developed Nelson\'s voice on the spot and describes him as "a throat-ripper". Ralph Wiggum had originally been voiced by Jo Ann Harris, but Cartwright was assigned to voice the character in "Bart the Murderer" (season three, 1991). Todd Flanders, the only voice for which Cartwright used another source, is based on Sherman (voiced by Walter Tetley), the boy from "Peabody\'s Improbable History", a series of shorts aired on "The Rocky and Bullwinkle Show".', 'Cartwright voices several other characters on the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, and Database. She first voiced Nelson in the episode "Bart the General" (season one, 1990).']}}]}, {'provenance': [{'wikipedia_id': '113158', 'title': 'Nancy Cartwright', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Nancy Jean Cartwright (born October 25, 1957) is an American actress, voice actress, and comedian, known for her long-running role as Bart Simpson on the animated television series "The Simpsons". Cartwright also voices other characters for the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, Database and Maggie.', 'Nancy Jean Cartwright (born October 25, 1957) is an American actress, voice actress, and comedian, known for her long-running role as Bart Simpson on the animated television series "The Simpsons". Cartwright also voices other characters for the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, Database and Maggie.', 'Cartwright also voices other characters for the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, Database and Maggie.']}}]}, {'provenance': [{'wikipedia_id': '64917', 'title': 'Nelson Muntz', 'section': 'Section::::Character.\n', 'start_paragraph_id': 18, 'end_paragraph_id': 18, 'meta': {'evidence_span': ['Cast member Nancy Cartwright voices the character, which first appeared in the fifth episode of the first season, "Bart the General" (1990). American voice actress Dana Hill was first supposed to provide Nelson\'s voice, and attended the read-through of the episode. However, as Cartwright wrote in her autobiography "My Life as a 10-Year-Old Boy", "the producers were still putting together this ensemble of [actors] and, come Monday, at the recording, she was nowhere to be found and the part was assigned to me. I didn\'t have time to ask why and I still don\'t have a clue." Cartwright also commented that when she first found out she would be voicing Nelson,', 'Cast member Nancy Cartwright voices the character, which first appeared in the fifth episode of the first season, "Bart the General" (1990)']}}]}]