What is "greneberg"

Greneberg, is a 6 tracks Extented Play (and a bonus track for Digital Download) by " Gangrene", (the collaboration of the rappers/producers The Alchemist and Oh No) and the rapper/producer " Roc Marciano".
The Album was released in July 19, 2011, and a Limited Edition vinyl picture disc pressing, came out in August 2011 - on " Decon Records". The EP production is made by The Alchemist, Oh No and Roc Marciano.