Question: Which South Korean reality-documentary show was Oh Jong-hyuk a former cast member of?

 He was a former cast member in the variety show "Law of the Jungle". Oh Jong-hyuk (; born February 16, 1983) is a South Korean singer.  He debuted as a member of Click-B in 1999, and made his debut as a solo artist in September 2006 with the album ""Issue"".  In September 2013, T-ara's management Core Contents Media released an official statement confirming that He and Soyeon of T-ara have been dating for the past 3 years.  He appeared on MBC King of Mask Singer in 2015 (Episode 35 and 36 with the stage name "Lonely Man Leon"). <SEP> Made in Chelsea: South of France, a spin-off series of Made in Chelsea, a British structured-reality television programme, was confirmed on 8 June 2016, and began airing on 1 August 2016.  and concluded after six episodes on 5 September 2016.  It was announced that the cast of "Made in Chelsea" would be travelling to Cannes to film a special series of the show.  It was revealed that this would be a stand-alone series which would not be promoted as the twelfth series.  The twelfth series followed in October 2016.  This is the third spin-off show filmed away from Chelsea following "" in 2014 and "" in 2015.  The series featured the return of former cast member Francis Boulle.  Whilst most of the Chelsea cast featured in this spin-off, there was notable absences from Josh "JP" Patterson, Richard Dinan and Rosie Fortescue.  It is the only series to include French cast member Lukas Avalon, the last to include Louise's ex-boyfriend Alik Alfus, and first to include her new boyfriend Ryan Libbey.  The series focused heavily on the love triangle between Francis, Olivia and Toff before he finally chooses to be with Olivia causing bitterness for Toff, as well as both Jess and Ollie finding holiday romances.  It also included the demise of Alex and Jamie's long-term friendship as Jamie chose to believe Frankie over Alex following multiple revelations. <SEP> Kim Seul-Gi (born October 10, 1991) is a South Korean actress who starred in many critically acclaimed dramas including "Oh My Ghostess" (2015), "Splash Splash Love" (2015) and "The Guardians" (2017).  She is also a former cast member of tvN's entertainment show "SNL Korea". <SEP>  It was first aired on October 21, 2011.  This show is a hybrid of reality-variety television, natural documentaries, and human drama; a new concept of programming. Law of the Jungle (Korean: 정글의 법칙 ) is a South Korean reality-documentary show on SBS.  The cast of celebrities travel to less-habitated, natural places to survive on their own and experience life with local tribes and people.  Originally airing at the Friday 11:05 pm KST time slot, the program was switched into "Good Sunday" beginning May 6, 2012, airing before "Running Man" at the 5:00 pm time slot, replacing "K-pop Star Season 1".  With the return of "K-pop Star Season 2" to "Good Sunday", the program returned to Friday nights but airing at 10:00 pm instead beginning November 16, 2012.  Originally airing as "Kim Byung-man's Law of the Jungle" (Korean: 김병만의 정글의 법칙 ) after the creator and "clan leader" Kim Byung-man, "Kim Byung-man's" was dropped from the title after episode 40.