Given the task definition and input, reply with output. In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Context: After several lineup changes during 196970, the band settled into its "classic" incarnation, with guitarist Steve Howe Link Information: Yes are an English progressive rock band formed in London in 1968 by singer Jon Anderson, bassist Chris Squire, guitarist Peter Banks Question: Who did Steve Howe replace someone else as Yes's guitarist?
Answer: Peter Banks