Question: Are Stuart Murdoch and Lee Sung-min both singers?
Related documents: [0]  [DOC] Lee Sung-min (born January 1, 1986) is a South Korean singer and actor. He is a member of the South Korean boy band Super Junior and its sub-groups Super Junior-T, Super Junior-H and Super Junior-M. [END] 
[1]  [DOC] Stuart Lee Murdoch (born 25 August 1968) is a Scottish musician, writer and filmmaker, and the lead singer and songwriter for the indie pop band Belle and Sebastian. [END] 
Answer: 
yes
yes