Complex sentence: The novels have been adapted numerous times, most notably a television series starring Guy Marchand, which began in 1991, graphic novels by artist Jacques Tardi; the third in this series was an original story by Tardi.
Split into simpler sentences: The novels have been adapted numerous times, most notably a television series starring Guy Marchand, which began in 1991. The third in this series was an original story by Tardi.