Question: Are both Rob Tyner and Bruce Dickinson considered musicians?
Context: Holy Hell is a heavy metal album released in 2005 by Rob Rock.  It is his third solo release and is known for being his heaviest and most aggressive album to date.  It was produced by Roy Z who is also known for producing solo albums by Rob Halford and Bruce Dickinson.  Roy Z is also credited for performing some of the guitar and bass parts on the album.  Many highly acclaimed musicians are featured throughout, including guitarist Carl Johan Grimmark of Narnia fame, and drummer Bobby Jarzombek who has played in bands such as Iced Earth and Spastic Ink.  Tobias Sammet of Edguy and Avantasia also makes a guest appearance, singing a duet with Rob on the closing track, "Move On". Iron Maiden are an English heavy metal band formed by bassist Steve Harris in 1975.  The band's first album, 1980's "Iron Maiden", was written primarily by Harris, with vocalist Paul Di'Anno co-writing two tracks and guitarist Dave Murray contributing "Charlotte the Harlot".  The 1981 follow-up, "Killers", was written almost entirely by the bassist, with frontman Di'Anno contributing only to the title track, "Killers" (the North American bonus track "Twilight Zone" was credited to Harris and Murray).  Bruce Dickinson replaced Di'Anno after the release of "Killers", although he did not contribute any songwriting to "The Number of the Beast", released in 1982, which featured three songs co-written by guitarist Adrian Smith.  "The Number of the Beast" also spawned Iron Maiden's first UK Singles Chart top ten in the form of "Run to the Hills", which charted at number seven on its release.  It was not until 1983's "Piece of Mind" that the songwriting process became a more varied and collaborative approach, with just four of its nine tracks being credited solely to Harris, two to Dickinson and Smith, one to Harris and Murray, one to Dickinson alone, and one to Harris, Dickinson, and Smith.  The Dickinson and Smith-penned "Flight of Icarus" was the first Iron Maiden single to chart in the United States, reaching number eight on the "Billboard" Mainstream Rock chart. "The Wicker Man" is a song by Iron Maiden, released as the first single and opening track from their album "Brave New World" in April 2000.  It is also the first single by the band since the returns of vocalist Bruce Dickinson and guitarist Adrian Smith in 1999.  It was co-written by Smith, Dickinson and Steve Harris.  It was co-produced by Kevin Shirley and Harris.  The title is inspired by the British cult film of the same name.  The song should not be confused with "Wicker Man" from Dickinson's solo career, the lyrics of which are more closely themed around the film.  The latter song can be found on the 2 disc edition of "The Best of Bruce Dickinson". Paul Bruce Dickinson (born 7 August 1958), known professionally as Bruce Dickinson, is an English singer, songwriter, musician, airline pilot, entrepreneur, author and broadcaster.  He is the lead singer of the heavy metal band Iron Maiden and is renowned for his wide-ranging operatic vocal style and energetic stage presence. The Book of Souls World Tour was a concert tour by Iron Maiden, held in support of their sixteenth studio album, "The Book of Souls".  The first leg of the tour saw the band play shows in 36 countries across six continents, which included their debut performances in El Salvador, Lithuania and China.  With 117 shows, it was the longest tour with Bruce Dickinson on vocals since the "Somewhere on Tour" in 1986-87.  The group, their crew and equipment were transported on a customised Boeing 747-400, nicknamed "Ed Force One", which was piloted by vocalist Bruce Dickinson. The Best of Bruce Dickinson is a compilation album released in 2001 by Bruce Dickinson.  Two versions were released; a single disc version and a bonus disc version.  On the front cover, the album title is imposed upon the seal of the demon Astaroth. Robert W. Derminer (December 12, 1944 – September 18, 1991), known as Rob Tyner, was an American musician best known as lead singer for the Detroit proto-punk band, MC5.  His adopted surname was in tribute to the jazz pianist McCoy Tyner.  It was Tyner who issued the rallying cry of "kick out the jams, motherfuckers" at the MC5's live concerts.  Tyner had originally auditioned as the bass player, but the band felt his talents would be best used as a lead vocalist. Man of Sorrows is the second single from Bruce Dickinson's fourth solo album, "Accident of Birth", released on 3 June 1997.  The song was originally written for a film called Chemical Wedding, which existed only as a script at the time (it was eventually filmed and released in May 2008).  The original version of the song is included on the Best Of Bruce Dickinson album and was recorded in 1990, engineered by André Jacquemin (who is better known for his sound-engineer work for Monty Python) and with Janick Gers on guitar. "Born in '58" is the last single from Bruce Dickinson's debut solo album, "Tattooed Millionaire", released on March 25 1991.  The song is about Bruce Dickinson's early life, growing up with his Grandparents in Worksop (Dickinson was born in 1958). Bruce Dickinson, a British heavy metal singer, has released six studio albums, two live albums, one compilations, ten singles, three video albums, fourteen music videos, and one box set.  In 1979, after playing in local groups, Dickinson joined hard rock band Samson.  He departed after two years to become Iron Maiden's lead vocalist.  His debut with this band is considered a "masterpiece", which was followed with a series of top-ten releases.  In 1989, while Iron Maiden were taking a year off, Dickinson and former Gillan guitarist, Janick Gers, composed a song for .  His solo debut, "Tattooed Millionaire" (1990), was an effort that favoured a hard rock/pop metal approach, different from what fans assumed would be an aggressive, Iron Maiden-like album.  Four songs—the title track, "Dive!  Dive!  Dive! ", "Born in '58", and a cover version of David Bowie's "All the Young Dudes"—were released as singles.  Dickinson returned to Iron Maiden, accompanied by Gers as the new guitarist, and the project went on hiatus. " Dive!  Dive!  Live! " was a live video recorded from a concert in Los Angeles, California, in August 1990, and released in July 1991.
Answer: yes