Question: Are both Nigel Clark and Ricky Ross singer-songwriters?

Context paragraphs:
Stand Upright in a Cool Place: Stand Upright in a Cool Place is the fifth studio album by the British band Dodgy.  Released on 19 February 2012, it also marks the reunion of the band's original line-up following the return of lead singer Nigel Clark who had left during the band's commercial peak in 1998.

Fergus Sings the Blues: "Fergus Sings the Blues" is the third single from the album "When the World Knows Your Name" by the Scottish rock band Deacon Blue.  Writer Ricky Ross has stated in an interview with Johnnie Walker that the song was inspired by "Gael's Blue" by Scottish singer-songwriter Michael Marra.

Real Gone Kid: "Real Gone Kid" is a song by the Scottish rock/pop band Deacon Blue.  Released in 1988, it was the first single to come from the band's second album "When the World Knows Your Name" which was released six months later.  The single was the band's first top ten hit, reaching No. 8 in the UK Singles Chart.  Vocalist Ricky Ross wrote the song about a performance he saw of ex-Lone Justice singer Maria McKee on stage (Deacon Blue had toured with Lone Justice for a time as the opening band).

Nigel Clark (pentathlete): Nigel Clark (born 25 March 1956) is a British modern pentathlete.  He competed at the 1980 Summer Olympics where he finished 8th in the team event and 33nd in the individual event.

Ricky Ross (musician): Richard Alexander "Ricky" Ross (born 22 December 1957) is a Scottish singer-songwriter and broadcaster.  He is the lead singer of the rock band Deacon Blue.

The Undeveloped Heart EP: The Undeveloped Heart EP is the sole single/EP release from Scottish rock musician Ricky Ross' album "New Recording".  It contains a new version of "The Undeveloped Heart", which was originally recorded by Ross' band Deacon Blue and re-recorded by Ross for "New Recording".  The addition of a driving bass line and guitar to "The Undeveloped Heart (98 Remix)" completes the move of the song from its original form as an understated piano ballad to a track that sits fully in alternative rock territory.

So Long Ago: So Long Ago is the solo debut album from Scottish rock musician Ricky Ross.  Ross later founded Deacon Blue.

What You Are (album): What You Are is a solo album from Scottish rock musician Ricky Ross.  It was the first solo album Ross released after the breakup of the band he fronted, Deacon Blue.

New Recording: New Recording is a solo album from Scottish rock musician Ricky Ross and member of Deacon Blue.  It was produced by Ross and former Love and Money keyboardist Paul McGeechan.

Nigel Clark: Nigel Richard Clark (born 18 September 1966 in Redditch, Worcestershire) is an English singer-songwriter, best known as the lead singer and bassist of Dodgy.

Supporting paragraphs: Nigel Clark Ricky Ross (musician)
Answer: yes