Question: are Richard Hagopian and Onno Tunç both musicians ?
Context: Skygirls is a collaborative album between Brazilian musicians Rogério Skylab and Leandra "Voz del Fuego" Lambert, famous for her work with bands such as Inhumanoids!  and Lingerie Underground.  Also counting with a guest appearance by Onno bassist Eliza Schinner, the album was released in 2009 through independent label Psicotropicodelia. Gülümse is Sezen Aksu's Turkish release and her most commercially successful album in Turkey.  The album sold more than 2 million and is one of the best-selling Turkish album.  Sezen Aksu on this album again worked with Onno Tunç and Aysel Gürel. Tülay Keçialan (born February 24, 1965 in Eskişehir), better known as Asya, is a Turkish pop singer and song-writer who appeared as backing vocalist for Nilüfer between 1990 and 1994.  Her first album "Asya" was released in 1994.  She worked with Onno Tunç, Garo Mafyan, Mustafa Sandal, Gökhan Kırdar, Deneb Pinjo, İskender Paydaş, and Özgür Buldum. Ohannes Tunçboyacıyan (a.k.a. Onno Tunç; Armenian: Օհաննես Թունչբոյաջյան ; December 20, 1948 - January 14, 1996) was a leading Armenian-Turkish musician, working mainly as a composer and an arranger.  Tunç also played bass guitar and occasionally double bass, contributing to the albums of several musicians.  He was the elder brother of musician Arto Tunçboyacıyan. Jonathan Rennert (17 March 1952) is an English organist, conductor and writer.  He gave his debut broadcast organ recital at the age of 19 in Westminster Cathedral, having become a Fellow of the Royal College of Organists at 18.  ('A force to be reckoned with', opined the reviewer in 'Music & Musicians'.)  He studied at the Royal College of Music under Richard Popplewell, John Barstow and William Lloyd Webber, and at Cambridge (where he was organ scholar of St John's College) under George Guest and Gillian Weir.  Awards included Cambridge University's John Stewart of Rannoch Scholarship in Sacred Music and 'Greater London Arts Association Young Musician 1975'.  Short periods based in London and Ottawa were followed by his appointment in 1979 as Director of Music of St Michael's Cornhill, the church which has been his base for 32 years.  Here he has given more than 400 of the weekly lunchtime organ recitals, and continued the musical traditions of such predecessors as William Boyce (the 18th-century composer) and Harold Darke.  He has tended to specialise in the music of J S Bach and romantic English composers, though he also gives first performances of new music.  He has given organ recitals in many countries, and in 'celebrity' series at the Royal Festival Hall, St Paul's Cathedral and Westminster Abbey, and was Musician-in-Residence at Grace Cathedral, San Francisco.  There are several CDs, including a choral disc of music by George Dyson in which Rennert conducted St Michael's Singers and the Royal Philharmonic Orchestra, and was commended by 'Gramophone' magazine: 'The performance is superb.  Rennert has the right sense of spaciousness and husbands his climaxes with measured artistry.'  Other choirs of which he has been chief conductor include the Elizabethan Singers and St Cecilia Chorus.  His writings include biographies of the infant prodigy and composer William Crotch, and of the organist George Thalben-Ball.  He has served as President of The Organ Club, Warden of the Incorporated Society of Musicians and Master of the Worshipful Company of Musicians.  He is a senior moderating examiner for the Associated Board of the Royal Schools of Music. "In Search of Perfect Consonance" profiles the Asian Youth Orchestra from its establishment in 1987 to its 25th anniversary in 2016.  China and Vietnam were engaged in a long and violent border war, relations between China and Japan were frosty with tensions running high across the Strait of Taiwan.  These events inspired Richard Pontzious to establish the Asian Youth Orchestra in Hong Kong with the support of world renowned musicians such as the great violinist Yehudi Menuhin who eventually became co founder and conducted the first concerts in 1990.  From the its humble beginnings the orchestra aimed to connect the region's aspiring young musicians in a bid to promote peace through music and has trained more than 2,000 musicians from across Asia throughout its 25-year history. Richard Avedis Hagopian (born 3 April 1937) is an American Oriental-style "oud" player and traditional Armenian musician. Turkey took part in the Eurovision Song Contest for the second time in 1978.  The country was represented by Nilüfer & Nazar with the song “Sevince” written by Hulki Aktunç and composed by Dağhan Baydur and Onno Tunç.  The entry was chosen during a national final called "Şarkı Yarışması".  It came 18th in the Eurovision 1978. 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. Monty Waters (April 14, 1938 in Modesto, California – December 23, 2008 in Munich, Germany) was an American jazz saxophonist, flautist and singer.  Waters received his first musical training from his aunt and first played in the church.  After his education in college, he was a member of a Rhythm & Blues band.  In the late 1950s he worked with musicians like BB King, Lightnin' Hopkins, Little Richard and James Brown on tour.  In San Francisco he played with King Pleasure and initiated in the early 1960s, a "Late Night Session" at Club Bop City.  There he came into contact with musicians such as Miles Davis, John Coltrane, Art Blakey, Red Garland and Dexter Gordon, who visited this club after their concerts.  In addition, he and Pharoah Sanders, Dewey Redman and Donald Garrett formed a big band.  In 1969 he moved to New York City and went with Jon Hendricks on a concert tour.  During the 1970s he participated in the "Loft Jazz" scene.  Like many other jazz musicians, he moved in the 1980s to Paris, where he worked with Chet Baker, Pharoah Sanders and Johnny Griffin.  Following Mal Waldron and Marty Cook, he came to Munich, Germany and continued to work with musicians such as Embryo, Götz Tangerding, Hannes Beckmann, Titus Waldenfels, Suchredin Chronov or Joe Malinga.
Answer: yes