In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Q: Passage: He had more likeable roles in two British children's TV series: The Ghosts of Motley Hall, which ran from 1976 to 1978 on ITV (produced by Granada Television), and as "Slugger" in Follyfoot, which ran from 1971 to 1973, also on ITV (produced by Yorkshire Television). He was in several other films and Everyday Maths (1978), a British TV schools programme starring Jack Wild as English's grandson. In 1978 he was the subject in This Is Your Life, while in May 1983 he was a guest on Desert Island Discs with Roy Plomley. Also in 1983 he played Frosch in Die Fliedermaus with English National Opera at the London Coliseum. In 1985 he appeared in an episode of the American TV series Magnum, P.I..
Link Information: The series ran from 1980 to 1988 during its first-run broadcast on the American television network CBS. Question: How many season did the American TV series that Arthur English appeared in run for?
A:
Answer: 8