Question: Out of the two musicians, Adam Shore (Warrant) and Gary Lightbody (Snow Patrol), who was the multi-instrumentalist, in addition to their vocal talents? 
Sentence (from "Gary Lightbody"): Gary Lightbody (born 15 June 1976) is a Northern Irish singer, songwriter, guitarist and multi-instrumentalist, best known as the lead singer and rhythm guitarist of the Northern Irish-Scottish rock band Snow Patrol.
Relevant evidence: Yes