Which artist is known for working with the band Monkey Bowl, Serj Tankian or Robert Ellis Orrall?
Serj Tankian:  He is best known as the lead vocalist, songwriter, keyboardist, and occasional live rhythm guitarist of the metal band System of a Down, formed in 1994. Robert Ellis Orrall: Robert Ellis Orrall (born May 4, 1955) is an American singer, songwriter, and record producer.
i don't know