Josef Leimberg contributed to a Grammy Award-winning album that was released when?
Josef Leimberg:  He contributed to Kendrick Lamar’s Grammy Award-winning album, To Pimp a Butterfly, and is currently signed with World Galaxy, the jazz imprint of Alpha Pup Records. To Pimp a Butterfly:  It was released on March 15, 2015, by Top Dawg Entertainment, Aftermath Entertainment and Interscope Records.
i don't know