Question: What job titles has the producer for the reality television programme Holiday Showdown held?

Context paragraphs:
Sol, Fest och Oroliga Föräldrar: Sol, Fest och Oroliga Föräldrar (English translation: "Sun, Celebration and Concerned Parents") is the Swedish version of "Sun, Sex and Suspicious Parents", a reality/documentary television programme originating in the UK.  The basic premise is that teenagers go on holiday under the impression they're being filmed for a stereotypical reality show, without knowing their parents also go to the holiday resort to spy on what their children are doing.  The programme has had one series to date, with eight episodes within it.

Embarrassing Bodies: Embarrassing Bodies (formerly Embarrassing Illnesses) is a British BAFTA-award winning medical reality television programme broadcast by Channel 4 and made by Maverick Television since 2007.  In 2011, an hour-long live show was introduced, "Embarrassing Bodies: Live from the Clinic", which makes use of Skype technology.  Various spin-offs have been produced in relation to the programme to target different patients, such as "Embarrassing Fat Bodies" and "Embarrassing Teenage Bodies".  The series' basic premise involves members of the public with a wide variety of medical conditions consulting the show's doctors for advice; in some cases, cosmetic or corrective surgery has been offered and undertaken to treat patients with more severe or noticeable ailments.

Simon Rockell: Simon Rockell is a British television producer.  He has most recently produced "Wakey Wakey Campers" in 2005.  He also produced "Holiday Showdown".  He came up with the idea for the popular sitcom, Teachers.

Rosemary Shrager: Rosemary Jacqueline Shrager (born 21 January 1951) is a British chef, best known for being an haute cuisine teacher on the reality television programme "Ladette to Lady", and as a judge on "Soapstar Superchef".  She also made an appearance on the reality TV series "I'm A Celebrity... Get Me Out Of Here! ".  Other television projects have included "Kitchen Showdown with Rosemary Shrager", where she weaned unhealthy fast-food families onto nutritious cuisine.  Shrager is an accomplished chef and has worked with fellow "Soapstar Superchef" judge Jean-Christophe Novelli.

Gulder Ultimate Search: Gulder Ultimate Search (also called GUS) is a Nigerian reality television series, created and sponsored by Nigerian Breweries Plc to promote the Gulder Lager Beer.  The first season premiered in 2004.  The GUS series is also the very first 100% local content reality television programme in Nigeria and it is a survival type reality programme that highlights the struggle of Contestants (10–30 persons, depending on the reference edition), their struggles against themselves and the wild i.e. nature and their search for a hidden treasure that brings to the last person standing instant fame and fortune.  The Winner of the last season in 2012 took home a 10 million naira cash prize and an SUV.

Holiday Showdown: Holiday Showdown was a BAFTA-nominated and Royal Television Society Award-winning reality television programme, produced by Chris Kelly for the United Kingdom independent TV production company RDF Media.  It was first broadcast in 2003 on ITV in the United Kingdom.

Chris Kelly (TV presenter): Christopher Paul Kelly (born 24 April 1940) is an English TV presenter, producer and writer.

Dumped: Dumped is a British reality television programme which started on 2 September 2007 and aired nightly until 5 September 2007 on Channel 4.  It involved 11 contestants living for three weeks on a rubbish dump next to a landfill site near Croydon, Surrey.  The contestants who "survived" the 21 days and used only what they found on the dump were awarded £20,000 to share equally between them.  The working title of the programme was Eco-Challenge.  One contestant, Darren Lumsden, voluntarily left the programme on Day 3.  The series was promoted with a large publicity campaign, which included advertisements on websites and a concert by the Royal Philharmonic Orchestra.  The programme achieved a peak of 2.4 million viewers, although this was marginally less than the number of people watching other channels at the same time.  The programme was criticised because it was filmed on an artificial landfill and for its choice of ""fame hungry"" contestants.

Great Reality TV Swindle: The Great Reality TV Swindle (also known as Project MS-2) was a con perpetrated in 2002 by Nik Russian, a British man who, at the time, was working at an entry-level position in a branch of the UK book chain Waterstone's.  Russian placed advertisements in major publications that invited people to audition for a year-long reality television programme where they could potentially win a prize of GB£ .  After receiving hundreds of responses, he auditioned some of them on Raven's Ait in London, then selected 30 successful auditionees to take part, without informing them that no actual programme had been commissioned.  Telling them that the show would last for an entire year, Russian instructed the participants to leave their homes, quit their jobs and then meet him in London on 10 June, where they would be divided into teams of ten and set their challenge for the next twelve months.

Love Island (2005 TV series): Love Island (originally Celebrity Love Island) is a British reality television programme.  In the show, twelve single celebrities spent five weeks on an island in Fiji.  Viewers would vote for the couple they would like to see in the "love shack" where the two would get to know one another better.  In the first series, each week viewers voted celebrities off the island, but in the second, the inhabitants had the final say.  The identities of those being kicked out were revealed in the elimination episodes.  The prize for the final couple left standing was £50,000.  The second series also featured the inhabitants having to cook and clean up after themselves to fight the appearance that they were just there for a free holiday.

Supporting paragraphs: Holiday Showdown Chris Kelly (TV presenter)
Answer: TV presenter, producer and writer