Question: On the 13th series of "Strictly Come Dancing" Helen George was paired with a professional dancer born in what year?

Context paragraphs:
Dianne Buswell: Dianne Buswell (born 1989) is an Australian ballroom dancer.  She has appeared on "So You Think You Can Dance Australia" and was a professional dancer on the Australian version of "Dancing with the Stars" in 2015.  Buswell became a professional dancer on "Strictly Come Dancing" beginning in 2017.

Jay McGuiness: James "Jay" McGuiness (born 24 July 1990) is a British singer, songwriter and dancer, best known as a vocalist with boy band The Wanted.  On 19 December 2015, partnered with Aliona Vilani, he won the 13th series of BBC's "Strictly Come Dancing".

Dance Factory: Dance Factory was a children's television show which ran for nine weeks from March to May 2005 at 10.30am on BBC One.  It was simulcast on the CBBC Channel.  It was hosted by Reggie Yates, better known as the host of "Top of the Pops", with co-presenters Camilla Dallerup and Nigel Clarke.  Camilla paired with David Dickinson and Roger Black in the BBC series, Strictly Come Dancing, while Nigel was better known as a host from Nickelodeon and professional dancer with the Stomp company.

Kevin Clifton: Kevin Clifton (born 13 October 1982) is an English professional dancer born in Waltham, Lincolnshire.  He is a professional dancer on the BBC TV series "Strictly Come Dancing", having previously worked as an assistant choreographer.  He has also featured on "Burn the Floor".  He is fondly called "Kevin from Grimsby".

Joanne Clifton: Joanne Kirsty Clifton (born 24 October 1983), also known as Jo, is a British professional dancer, presenter, actress, singer.  born in Waltham, Lincolnshire.  She won the World Ballroom Showdance Championship in 2013 and also won the European Professional Ballroom Championship and World Dancesport Games.  She has been a professional dancer on the BBC TV series "Strictly Come Dancing" since 2014, winning the Christmas Special in 2015 with Harry Judd who was series 9 champion and the fourteenth series in 2016 with Ore Oduba.  Also appearing as an expert presenter on "" in 2015.

The Strictly: The Strictly is a signature dance routine from the BBC show "Strictly Come Dancing", which launched in the 13th series of the popular entertainment show.  The dance was devised by "Strictly Come Dancing"'s Director of Choreography, Jason Gilkison and draws inspiration from some of the show's most iconic moves, as well as celebrating some of the show's stars.

Aljaž Skorjanec: Aljaž Škorjanec (born 19 February 1990) is a Slovenian dancer and choreographer who has appeared on the BBC show Strictly Come Dancing as a professional dancer.

Helen George: Helen George (born 19 June 1984 in Winchester Hampshire) is an English actress.  She is best known for her role as Trixie Franklin on the BBC TV drama series "Call the Midwife".  In 2015, she participated in the thirteenth series of BBC One's "Strictly Come Dancing", she was paired with Aljaž Skorjanec, and finished in sixth place.

Anthony Ogogo: Anthony Osezua Ojo Ogogo (born 24 November 1988) is an English professional boxer from Lowestoft, England, competing in the middleweight division.  He is currently promoted by Golden Boy Promotions.  In 2015, he participated in the 13th series of BBC One's "Strictly Come Dancing".

Vincent Simone: Vincent Simone (born 15 March 1979) is a professional dancer born in Italy, who has appeared as a professional dancer on "Strictly Come Dancing" from 2006 until 2012.  He moved to Guildford, Surrey, United Kingdom when he was 17.  Simone and professional partner Flavia Cacace perform under the brand name "Vincent and Flavia".

Supporting paragraphs: Helen George Aljaž Skorjanec
Answer: 1990