Question: Shin Hye-sung and Trent Reznor, have which mutual occupations?

Context paragraphs:
Shin Hye-sung discography: Shin Hye-sung, lead vocalist of the Korean boyband Shinhwa has had a solo singing career concurrent with his Shinhwa activities since 2005.  His discography consists of 7 Korean-language studio albums, 1 Japanese-language studio albums, and 2 compilation albums, one released in Korea and one in Japan.  He also released re-recordings of six of his previous duets with new singers in 2014, as part of his "Once Again" project.  He has also recorded 12 songs for soundtracks.

Shin Hye-sung: Jung Pil-kyo (born November 27, 1979), better known by his stage name Shin Hye-sung, is a South Korean singer-songwriter.  He is best known as a member of the South Korean boy group Shinhwa.

Shinhwa Broadcast: Shinhwa Broadcast () is a South Korean variety television programme broadcast on general service cable channel Joongang Tongyang Broadcasting Company (jTBC).  It is hosted by six-member boy band Shinhwa: Eric Mun, Lee Min-woo, Kim Dong-wan (up till April 2013), Shin Hye-sung, Jun Jin and Andy Lee (up till November 2013).  The weekly programme premiered on 17 March 2012, and airs on Sundays at 23:00.  The show went on hiatus after the 16 June 2013 broadcast and it returned on 3 November 2013 with a new format for season two.  As of 8 December 2013, 65 episodes in two seasons have been broadcast.

S (South Korean band): S (에스) is a South Korean project group consisting of three members: Kangta, Lee Ji-hoon and Shin Hye-sung.  The group debuted in 2003, under the SM Entertainment label.  After 11 years, they released and promoted another mini-album in 2014.

Remix 2014 EP: Remix 2014 EP is a remix extended play (EP) by American industrial rock band by Nine Inch Nails.  It was released on January 21, 2014 exclusively on Beats Music, a streaming service project led by Trent Reznor and Dr. Dre.  Trent Reznor acts as the chief creative officer of the website.

Shinhwa videography: This is a list of videography by South Korean six-member boy band Shinhwa.  Formed in 1998 under SM Entertainment, it consists of Eric Mun, Lee Min-woo, Kim Dong-wan, Shin Hye-sung, Jun Jin and Andy Lee.  They moved to Good Entertainment in July 2003, upon the expiration of their contract.  In 2011, after a four-year hiatus, during which they served individual mandatory military services, they formed the Shinhwa Company to continue to perform together.  This list the official music videos released by SM Entertainment, Good Entertainment and Shinhwa Company.

List of Shinhwa Broadcast episodes: This is a list of episodes of Shinhwa Broadcast (), a South Korean variety television programme, broadcast on general cable channel Joongang Tongyang Broadcasting Company (jTBC).  The show is hosted by the six-member boy band Shinhwa: Eric Mun, Lee Min-woo, Kim Dong-wan, Shin Hye-sung, Jun Jin and Andy Lee.

Trent Reznor: Michael Trent Reznor (born May 17, 1965) is an American singer, songwriter, musician, record producer, and film score composer.

List of Nine Inch Nails band members: Nine Inch Nails is an American industrial rock band, founded in 1988 by Trent Reznor in Cleveland, Ohio.  Nine Inch Nails live performances contrast with its in-studio counterpart: although Reznor is in complete creative control of Nine Inch Nails in-studio, he typically assembles groups of backing musicians to interpret songs for tours and other live performances.  In 2009 Reznor announced that Nine Inch Nails was done touring, but that he would continue to create music under the name.  In 2013 Reznor announced that Nine Inch Nails would return to the stage and revealed tour dates for the Twenty Thirteen Tour.

Eric Mun: Eric Mun (born Mun Jung-hyuk on February 16, 1979) is a South Korean singer and actor.  He is a member and leader of the South Korean boy band Shinhwa.  He is also well known for several dramas such as "Phoenix" (2004), "Super Rookie" (2005) and "Another Oh Hae-young" (2016).  He was with Top Class Entertainment from 2007 to December 2013.  In 2014, Mun and his manager of 10 years, Lee Jong-hyun, set up a new management agency, E&J Entertainment, for his individual activities.  Mun is also the CEO of Shinhwa Company, the home agency of his group, with Lee Min-woo as co-CEO since 2011, and with the remaining members—Kim Dong-wan, Shin Hye-sung, Jun Jin and Andy Lee—as shareholders.

Supporting paragraphs: Shin Hye-sung Trent Reznor
Answer: singer, songwriter