Q: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Context : Gomm had started in around 1962/1963 in Unit 4, formed by Ian Gomm on rhythm and lead guitar, vocals, Martin Davis on bass and Simon Behar on drums, who were all pupils at Ealing County School for Boys.
Answer : guitar
A:
Which musical instrument was played by Ian Gomm?