Question: The grandson of Dorothy Bridges was born in what year?

Context paragraphs:
List of EastEnders characters (2015): The following is a list of characters that first appeared in the BBC soap opera "EastEnders" in 2015, by order of first appearance.  All characters were introduced by the show's executive producer Dominic Treadwell-Collins.  January saw the arrival of the year's first baby, Matthew Mitchell Cotton, son of Ronnie Mitchell and Charlie Cotton.  The following month saw the show celebrate its 30th anniversary with a live week, which oversaw the live arrivals of Vincent Hubbard, and the second baby born in 2015, Pearl Fox-Hubbard, Vincent's daughter with Kim Fox-Hubbard.  In March, Claudette Hubbard arrived as Donna Yates' foster mother and an acquaintance of Les Coker followed by Stan Carter's friend Cyril Bishop and Sharon Mitchell's aunt Margaret Midhurst, whilst Denise van Outen joined in April as Karin Smart.  May saw the arrivals of June Whitfield as Sister Ruth, Mick and Linda Carter's son Ollie Carter, the year's third baby, Mo Harris' business associate Fat Elvis and Kush Kazemi's mother, Carmel.  Paul Coker, the grandson of Les and Pam Coker, was introduced in June, as was Jade Green, the long-lost daughter of Shabnam Masood and Dean Wicks.  After Kathy Sullivan's surprise return during the 30th anniversary in February, her husband Gavin Sullivan made his debut in August.  September saw the arrivals of Max Branning's prosecution lawyer Hazel Warren and Louie Beale, the baby son of Lauren Branning and Peter Beale.  In October, Elaine Peacock's toyboy lover Jason Adams was introduced, as well as first transgender character to be played by a transgender actor, Kyle Slater.  December saw the birth of the year's fifth baby, Kush and Stacey Slater's son, Arthur Fowler.

M.anifest: M.anifest (born Kwame Ametepee Tsikata, 20 November 1982) is an award-winning Ghanaian rapper, singer and songwriter.  He was crowned the King of Ghana Hip-Hop in 2017 when he won Best Rapper and Hip-Hop song of the year at the Ghana Music Awards.  He has worked with the likes of Damon Albarn, Flea, Tony Allen, Erykah Badu, and is featured on five songs on the "Rocket Juice and The Moon" album.  He is the grandson of one of Africa’s foremost ethnomusicogists and composers J.H. Kwabena Nketia.  In 2012, BBC’s arts program "The Strand" tipped him as one of four acts to look out for in 2012.  In 2015 M.anifest's single "someway bi" earned him a third place honor in the International Songwriters Competition (ISC).  In the same year The Guardian named M.anifest as "the foremost rapper on the continent." .  M.anifest currently lives in Accra (Madina) and Minneapolis.

Gregg Cash: Gregg Cash (born September 6th 1985) is a Philadelphia born, Los Angeles based bass guitarist & Music Director best known as a current member of the hard rock band Josh Todd and The Conflict alongside Buckcherry founders Josh Todd and Stevie D.  The band’s debut album Year Of The Tiger was released September of 2017.  Cash is also known for his work as the former bassist in Dorothy (band) on Jay Z’s Roc Nation record label.  Dorothy (band) was ranked #14 on RollingStone Magazine’s 50 best new bands in 2014.  Cash is currently a sponsored player by Orange Amps.

Jayde Nicole: Jayde Nicole (born February 19, 1986) is a Canadian model.  She was "Playboy"′s Playmate of the Month for January 2007 and was named the 2008 Playmate of the Year in the June issue of the men's magazine.  She is the first Canadian Playmate of the Year in 26 years, and the third overall, the previous two being Dorothy Stratten and Shannon Tweed.

Dorothy Stratten: Dorothy Ruth Hoogstraten (February 28, 1960 – August 14, 1980), who took the stage name Dorothy Stratten, was a Canadian Playboy Playmate, model, and actress.  Stratten was the "Playboy" Playmate of the Month for August 1979, Playmate of the Year in 1980 and was the second Playmate (after Lee Ann Michelle) born in the 1960s.  Stratten appeared in three comedy films and in at least two episodes of shows broadcast on US network television.  She was murdered at the age of 20 by her estranged husband/manager Paul Snider, who committed suicide on the same day.  Her death inspired two motion pictures.

Dorothy Bridges: Dorothy Louise Bridges (née Simpson; September 19, 1915 – February 16, 2009) was an American actress and poet.  Bridges was the matriarch of an acting family, which included her late husband, Lloyd Bridges, her sons, Beau Bridges and Jeff Bridges, and her grandson, Jordan Bridges.  Bridges was sometimes credited as Dorothy Dean.

Jordan Bridges: Jordan Bridges (born November 13, 1973) is an American actor.

Ezra J. Warner (historian): Ezra Joseph Warner III (July 4, 1910 – May 30, 1974) was a noted historian of the American Civil War.  He was born in Lake Forest, Illinois and lived in La Jolla, California where he worked as an investment counselor.  He was the son of Ezra J. Warner, Jr. and grandson of Ezra J Warner, who were wholesale grocery business executives in Chicago, Illinois.  His father, Ezra J. Warner, Jr., was president & treasurer of wholesale grocery business Sprague, Warner & Company and vice president of the Chicago Orchestral Association.  His mother was the former Marion Hall.  He married Rosamond Moore in 1932 but his wife is identified on their tombstone as Dorothy P. Warner.  He is buried in Lake Forest Cemetery in Lake Forest.  His great uncle was Union General James M. Warner.

Densey Clyne: Densey Clyne (born Dorothy Denise Bell, 4 December 1922) is an Australian naturalist, photographer and writer, especially well known for her studies of spiders and insects.  She was born in Risca, Wales, United Kingdom, and moved to Australia in 1936.  During World War II she served as a commissioned officer in the Australian Women's Army Service, after a year in the Land Army.  She married Peter Clyne (1927–1987) in 1950.  Clyne lives in Wauchope, New South Wales.

Ashleigh Cummings: Ashleigh Cummings (born 11 November 1992) is an Australian actress.  She was born in Saudi Arabia and moved to Australia with her family when she was twelve.  Cummings joined a performing arts school where she learned dance and acting, before appearing in "" in 2007.  After making appearances in "Green Fire Envy" and the soap opera "Home and Away", Cummings was cast as Robyn Mathers in "Tomorrow, When the War Began".  The film, based on the book of the same name, earned Cummings a nomination for Best Young Actor at the 2010 Australian Film Institute Awards.  In 2012, the actress began co-starring in ABC1's "Miss Fisher's Murder Mysteries" as Dorothy Williams for three seasons.  That same year, she was cast in the new television adaptation of "Puberty Blues".

Supporting paragraphs: Dorothy Bridges Jordan Bridges
Answer: 1973