Question: Jack Bruce and Buster Bloodvessel are both singers or painters?
Sentence (from "Jack Bruce"): John Symon Asher "Jack" Bruce (14 May 1943 – 25 October 2014) was a Scottish musician, singer and songwriter known primarily for his contributions to the British supergroup Cream, which also included guitarist-singer Eric Clapton and drummer Ginger Baker.
Relevant evidence: Yes