Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Q: Context : Guttorm Guttormsen (born 28 June 1950 in Mo i Rana, Norway) is a Norwegian Jazz musician (flute, clarinet, alto saxophone), arranger and composer.
Question : What musical instrument did Guttorm Guttormsen specialise at?
A:
clarinet