Question: Who were the creators of the long-running British soap opera in which Alison Pargeter plays the role of Sarah Cairns?

Context paragraphs:
Sue Nicholls: Susan Frances Nicholls (born 23 November 1943) is an English actress, known for her long-running role as Audrey Roberts in the British soap opera "Coronation Street".  Having played Audrey on a recurring basis for six years from the character's debut in 1979, she joined the cast permanently in 1985.  She won the 2000 British Soap Award for Best Comedy Performance and the 2003 British Soap Award for Best Dramatic Performance.

EastEnders: EastEnders is a long-running British soap opera created by Julia Smith and Tony Holland which has been broadcast on BBC One since 1985.  Set in the East End of London in the fictional Borough of Walford, the programme follows the stories of local residents and their families as they go about their daily lives in Albert Square.  The series was initially screened as two 30-minute episodes per week; however, since 2001, episodes have been broadcast every day apart from Wednesdays and weekends.  Same-day repeats of the series were previously shown on BBC Three and omnibus editions were shown on BBC Two, however, since 2016 these have been broadcast on UK-based TV channel W.

Stephanie Tague: Stephanie Tague (born 1966) is an English actress who was active in film and television during the 1980s.  Her earliest role was as Victoria Dennison in the 1982 British children's television series "Andy Robson".  She went on to play the part of Michelle Robinson in the long-running British soap opera "Coronation Street".

Susan Hanson: Susan Hanson (born 2 February 1943, in Preston, Lancashire) is an English actress who played the part of Diane Lawton aka Diane Parker aka Diane Hunter in the long-running British soap opera "Crossroads" from 1966-87, when her character was controversially killed off.  She also had a brief role in the film "Catch Us If You Can" (1965) starring The Dave Clark Five.

Hollyoaks: Hollyoaks is a British soap opera, first broadcast on Channel 4 on 23 October 1995.  It was originally devised by Phil Redmond, who had previously conceived the Channel 4 soap "Brookside".  The programme is set in a fictional suburb of Chester called Hollyoaks, and features a large cast of characters primarily aged between 16 and 35.  It is mostly filmed and produced in Childwall, Liverpool, although nearby locations are sometimes used.  Beginning with a cast of just seven major characters in 1995, the serial now has approximately 50 main cast members.  "Hollyoaks" has a high cast turnover in comparison with other British soaps; as of May 2014, just thirty-seven characters have spent five years or longer on the show.  The programme has won 28 British Soap Awards, 11 Inside Soap Awards, one "TRIC Award" and one National Television Award; at the 2014 British Soap Awards, "Hollyoaks" won Best British Soap for the first time, breaking the 15-year draw between rival soaps "EastEnders" and "Coronation Street".  It is also popular around the world.  The longest-serving cast member is Nick Pickard, who has played Tony Hutchinson since the first episode in 1995; all the other original characters left before 2000.

Noele Gordon: Joan Noele Gordon (25 December 1919 – 14 April 1985) was a British stage, film, television actress and presenter.  She played the role of Meg Mortimer (originally Richardson) in the long-running British soap opera "Crossroads" from 1964 to 1981.

Karen Henthorn: Karen Henthorn (born 1963) is a British character actress who portrayed the role of Teresa Bryant in the long-running British soap opera "Coronation Street".  She appeared in the role briefly in 2007 and became a regular character in 2008.  Her character was involved in major story lines.  In late 2008, she left the show but returned on 13 April 2009.  She then departed the show in 2010.

Liz Dawn: Sylvia Butterfield MBE (8 November 1939 – 25 September 2017), known professionally as Elizabeth Dawn or Liz Dawn, was an English actress, best known for her role as Vera Duckworth in the long-running British soap opera "Coronation Street".  First starting on the serial in 1974, she had a recurring role as a factory worker until her husband, Jack, (played by Bill Tarmey) first appeared in 1979.  She played the character of Vera for 34 years.  For her role in the soap, she received the Lifetime Achievement Award at the 2008 British Soap Awards.  She was appointed an MBE in the 2000 Queens Birthday Honours.

Sally Dynevor: Sally Dynevor ("née" Whittaker; born 30 May 1963) is an English actress, known for her long-running role as Sally Webster in the ITV soap opera "Coronation Street", which she has played since 1986.  She won the 2015 British Soap Award for Best Comedy Performance, and the 2016 British Soap Award for Best On-Screen Partnership with Joe Duttine.

Alison Pargeter: Alison Pargeter (born 31 May 1972) is an English actress who played the roles of stalker Sarah Cairns in the BBC soap opera "EastEnders", also Mary Slessor in an 11-part television series of" Mary Slessor", and the Nag's Head barmaid called Val in the BBC "Only Fools and Horses" prequel "Rock & Chips".

Supporting paragraphs: Alison Pargeter EastEnders
Answer: Julia Smith and Tony Holland