Question: Name the American hip hop recording artist, actor and activist from Brooklyn who starred alongside Bruce Willis in the 2006 American crime thriller film '16 Blocks'?
Sentence (from "Mos Def"): Best known for his music, Mos Def embarked on his hip hop career in 1994, alongside his siblings in the short-lived rap group Urban Thermo Dynamics (UTD), after which he appeared on albums by Da Bush Babees and De La Soul.
Relevant evidence: No