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In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Radiohead are an English rock band from Abingdon, Oxfordshire, formed in 1985. The band consists of Thom Yorke (vocals, guitar, piano, keyboards), brothers Jonny Greenwood (lead guitar, keyboards, other instruments) and Colin Greenwood (bass), Ed O'Brien (guitar, backing vocals) and Philip Selway (drums, percussion). They have worked with producer Nigel Godrich and cover artist Stanley Donwood since 1994.
Output:
how many guitarists are members of radiohead quizlet