Question: Are Naser Mestarihi and Justin Sane both singer-songwriters?

Related documents: [0]  [DOC] Justin Cathal Geever, known professionally as Justin Sane, is the lead guitarist and singer/songwriter of the United States-based musical group Anti-Flag, a punk rock band formed in 1988 in Pittsburgh, Pennsylvania known for its outspoken left-wing views. He holds dual US and Irish citizenship and lives in Pittsburgh. His stage name was bestowed upon him by friends in Pittsburgh's punk scene. [END] 
[1]  [DOC] Naser Mestarihi (Arabic: ناصر شاهر صالح المستريحي; born 14 October 1987) is a Qatari born Jordanian-Pakistani singer-songwriter and multi-instrumentalist (guitars, bass & vocals) who is based out of Doha, Qatar and Dubai, United Arab Emirates. Naser is the first rock musician to ever officially release a rock album out of Qatar, the "Naser Mestarihi EP". He released his second album "1987" on 17 June 2013. [END]  
Answer: yes
yes