Question: Bobby Sichran was an alternative hip hop musician who has been compared to an American singer whose six-minute single "Like a Rolling Stone", recorded in 1965, enlarged what?
Sentence (from "Bob Dylan"): Much of his most celebrated work dates from the 1960s, when he became a reluctant "voice of a generation" with songs such as "Blowin' in the Wind" and "The Times They Are a-Changin'", which became anthems for the Civil Rights Movement and anti-war movement.
Relevant evidence: No