Complex sentence: It was founded by classically trained organist/flautist Thijs van Leer in 1969, and is most famous for the songs "Hocus Pocus" and "Sylvia".
Split into simpler sentences: It was founded by classically trained organist/flautist Thijs van Leer in 1969. It is most famous for the songs "Hocus Pocus" and "Sylvia".