Question: Iceberg Slim, given name Robert Beck,  was an American pimp who subsequently became an influential author, Beck's fiction have been acknowledged as an influence by several rap musicians, from which genre?
Sentence (from "Gangsta rap"): After the national attention that Ice-T and N.W.A attracted in the late 1980s and early 1990s, gangsta rap became the most commercially lucrative subgenre of hip hop.
Relevant evidence: No