Question: WHo is a Grammy winning American musician of Armenian descent, Armen Nalbandian or Arto Tunçboyacıyan?

Related documents: [0]  [DOC] Armen Nalbandian (born April 6, 1978 in Manchester, England) is a jazz pianist, composer, author, and activist from Los Angeles, California, known for his multidisciplinary collaborations in visual and fine art. [END] 
[1]  [DOC] Arto Tunçboyacıyan (Armenian: Արտո Թունջբոյաջյան ) (born 4 August 1957 in Istanbul) is a Grammy winning American musician of Armenian descent. An avant-garde folk artist (singer, multi-instrumentalist), he appeared on more than 200 records in Europe before arriving in the United States, where he went to work with numerous jazz legends including Chet Baker, Marc Johnson, Al Di Meola, and Joe Zawinul as well as a semi-regular stint with Paul Winter and the Earth Band. Arto fronts his own group called the Armenian Navy Band. He also worked with Turkish singer Sezen Aksu and the Greek singer Eleftheria Arvanitaki. His brother Onno Tunç was also a musician. He is also a member of the band Night Ark. He has won a Grammy award. [END]  
Answer: Arto Tunçboyacıyan
Arto Tunçboyacıyan