Simplify the following text for a Grade 5 native English-speaking person.
Original: The best-known of Pipo-actors was Amsterdam actor Cor Witschge , who played the part in the television series from 1958 to 1968 and from 1974 to 1980 .
Simplified: The actor who took the part of Pipo de Clown was Cor Witschge ( 1925-1991 ) . The television series started in 1958 and was shown until 1980 .