Question: Name the songwriter from San Francisco who operates the Art of Ears Studio and who worked with the lead vocalist for the hip hop group Digital Underground?
Sentence (from "Andy Ernst"): Artists he has worked with include: Green Day, AFI, Sway & King Tech, Rancid, Tiger Army, The Nerve Agents, Malo, Link 80, Screeching Weasel, Swingin' Utters, Screw 32, Good Riddance, Fury 66, Shock G and Money B.
Relevant evidence: Yes