Question: Name the English rock band formed in London who achieved international acclaim with their progressive and psychedelic music and who were a significant influence on the German progressive rock band Sylvan alongside Marillion and Genesis?
Sentence (from "Susumu Hirasawa"): In the fifth year of elementary school, Hirasawa took up the electric guitar, inspired by the surf and instrumental rock bands he heard on the radio and on TV, later joining his junior high school's band.
Relevant evidence: No