Please answer the following question: Information: - Robert Duncan Coutts ( born February 4 , 1969 ) is a Canadian musician , best known for being the bassist for Our Lady Peace since 1995 . - Our Lady Peace (sometimes shortened to OLP) is a Canadian rock band formed in Toronto, Ontario, in 1992. Headed by lead vocalist Raine Maida since its formation, the band additionally consists of Duncan Coutts on bass, Steve Mazur as lead guitarist, and Jason Pierce on drums. The band has sold millions of albums worldwide, won four Juno Awards, and won ten MuchMusic Video Awards the most MMVAs ever awarded to any artist or group. Our Lady Peace are one of Canada's most popular bands and are also one of the few Canadian rock acts that managed to achieve success in both the 90s and 2000s. - Raine Maida (born Michael Anthony Maida on February 18, 1970), is a Canadian musician best known as being the lead vocalist and primary songwriter of the alternative rock band Our Lady Peace. He has come to be known for his unique countertenor nasal falsetto singing voice, as well as his cryptic and poetry-influenced song lyrics. He occasionally plays certain instruments, such as the acoustic guitar, while performing with Our Lady Peace. What entity does 'duncan coutts' has the relation 'instrument' with?
Answer:
guitar