Question: What is the birthday of the rapper featured on the mixtape Crenshaw who goes by the name 9thmatic?
Sentence (from "9th Wonder"): He began his career as the main producer for the group Little Brother in Durham, North Carolina, and has also worked with Mary J. Blige, Jean Grae, Wale, Jay-Z, Murs, Drake, Buckshot, Chris Brown, Destiny's Child, J. Cole, Kendrick Lamar, Erykah Badu, Ludacris, Mac Miller, David Banner, Lecrae, Jill Scott, Big Boi, Rapsody, and Anderson .
Relevant evidence: No