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 "Alternative hip hop"): AllMusic defines it as follows: "Alternative rap refers to hip hop groups that tend not to conform to any of the traditional forms of rap, such as gangsta, bass, hardcore, pop, and party rap.
Relevant evidence: No