Question: Who produced the mixtapes 63 and 19 which includes a collaboration with an American hip hop group from New York City known as the Beastie Boys?
Sentence (from "Beastie Boys"): For the majority of their career, the group consisted of Michael "Mike D" Diamond (vocals, drums), Adam "MCA" Yauch (vocals, bass) and Adam "Ad-Rock" Horovitz (vocals, guitar).
Relevant evidence: No