Question: The rapper of For Whom the Beat Tolls is one half of what group? 
Sentence (from "For Whom the Beat Tolls"): For Whom the Beat Tolls (a play on the Ernest Hemingway novel 'For Whom the Bell Tolls', which itself is drawn from "Meditation XVII" of "Devotions upon Emergent Occasions", a series of essays by metaphysical poet John Donne) is the eighth studio album by rapper Canibus, released through Mic Club Music on May 29, 2007 in the United States and June 5 worldwide.
Relevant evidence: Yes