Question: Along with Russell Simmons, the producer of the Avett Brothers album "Magpie and the Dandelion" co-founded what record label? 
Sentence (from "Magpie and the Dandelion"): The album was produced by Rick Rubin who produced their previous two full-length studio albums, 2009's "I and Love and You" and 2012's "The Carpenter".
Relevant evidence: Yes