Question: When did the creator of Britain's Got Talent announce he was no longer going to be an American Idol judge?

full_context: Document 1: American Idol: Season 12 premiered on January 16, 2013. Judges Jennifer Lopez and Steven Tyler left the show after two seasons. This season's judging panel consisted of Randy Jackson, along with Mariah Carey, Keith Urban and Nicki Minaj. This was the first season since season nine to have four judges on the panel. The pre-season buzz and the early episodes of the show were dominated by the feud between the judges Minaj and Carey after a video of their dispute was leaked to TMZ.
Document 2: American Idol: Towards the end of the season, Randy Jackson, the last remaining of the original judges, announced that he would no longer serve as a judge to pursue other business ventures. Both judges Mariah Carey and Nicki Minaj also decided to leave after one season to focus on their music careers.
Document 3: Britain's Got Talent (series 11): Britain's Got Talent Series 11 Broadcast from 15 April -- 3 June 2017 Judges Simon Cowell Amanda Holden Alesha Dixon David Walliams Presenter (s) Anthony McPartlin (ITV) Declan Donnelly (ITV) Co-presenter (s) Stephen Mulhern (ITV2) Broadcaster ITV ITV2 (BGMT) Winner Tokio Myers Origin London Genre (s) Pianist Runner - up Issy Simpson Chronology ◀ 2017 ▶
Document 4: Britain's Got Talent: Britain's Got Talent (often abbreviated to BGT) is a televised British talent show competition, broadcast on ITV. It is part of the global Got Talent franchise created by Simon Cowell, and is produced by both Thames (formerly Talkback Thames) and Syco Entertainment production, with its distribution handled by FremantleMedia. Since its premiere in June 2007, each series has been aired in late Spring / early Summer, and hosted by Ant & Dec. To accompany each series since it first began, a sister show is run on ITV2 entitled Britain's Got More Talent presented by Stephen Mulhern. Initially planned for 2005 before the first series of America's Got Talent, a dispute between Paul O'Grady, the originally conceived host of the programme, and the broadcaster, led to production being suspended until 2007.
Document 5: Britain's Got Talent (series 9): Britain's Got Talent Series 9 Broadcast from 11 April -- 31 May 2015 Judges Simon Cowell Amanda Holden Alesha Dixon David Walliams Presenter (s) Anthony McPartlin (ITV) Declan Donnelly (ITV) Co-presenter (s) Stephen Mulhern (ITV2) Broadcaster ITV ITV2 (BGMT) Winner Jules O'Dwyer & Matisse Origin Blackpool, England Genre (s) Musical canine freestyle Runner - up Jamie Raven Chronology ◀ 2015 ▶
Document 6: American Idol: In season eight, Latin Grammy Award-nominated singer–songwriter and record producer Kara DioGuardi was added as a fourth judge. She stayed for two seasons and left the show before season ten. Paula Abdul left the show before season nine after failing to agree terms with the show producers. Emmy Award-winning talk show host Ellen DeGeneres replaced Paula Abdul for that season, but left after just one season. On January 11, 2010, Simon Cowell announced that he was leaving the show to pursue introducing the American version of his show The X Factor to the USA for 2011. Jennifer Lopez and Steven Tyler joined the judging panel in season ten, but both left after two seasons. They were replaced by three new judges, Mariah Carey, Nicki Minaj and Keith Urban, who joined Randy Jackson in season 12. However both Carey and Minaj left after one season, and Randy Jackson also announced that he would depart the show after twelve seasons as a judge but would return as a mentor. Urban is the only judge from season 12 to return in season 13. He was joined by previous judge Jennifer Lopez and former mentor Harry Connick, Jr.. Lopez, Urban and Connick, Jr. all returned as judges for the show's fourteenth and fifteenth seasons.
Document 7: Britain's Got Talent (series 8): Britain's Got Talent Series 8 Broadcast from 12 April (2014 - 04 - 12) -- 7 June 2014 (2014 - 06 - 07) Judges Simon Cowell Amanda Holden Alesha Dixon David Walliams Ant & Dec (guests) Presenter (s) Anthony McPartlin (ITV) Declan Donnelly (ITV) Co-presenter (s) Stephen Mulhern (ITV2) Broadcaster ITV ITV2 (BGMT) Winner Collabro Origin Leeds, England Song ``Bring Him Home ''Genre (s) Musical theatre Runner - up Lucy Kay Chronology ◀ 2014 ▶
Document 8: Britain's Got Talent (series 12): Britain's Got Talent Series 12 Broadcast from 14 April -- 3 June 2018 Judges Simon Cowell Amanda Holden Alesha Dixon David Walliams Presenter (s) Anthony McPartlin (ITV; Auditions only) Declan Donnelly (ITV) Co-presenter (s) Stephen Mulhern (ITV2) Broadcaster ITV ITV2 (BGMT) Winner Lost Voice Guy Origin Newcastle upon Tyne Genre (s) Stand - up Comedian Runner - up Robert White Chronology ◀ 2018
Document 9: America's Got Talent: America's Got Talent Genre Reality Talent contest Created by Simon Cowell Directed by Russell Norman Creative director (s) Brian Friedman Presented by Regis Philbin Jerry Springer Nick Cannon Tyra Banks Judges Piers Morgan David Hasselhoff Brandy Norwood Sharon Osbourne Howard Stern Howie Mandel Mel B Heidi Klum Simon Cowell Country of origin United States Original language (s) English No. of seasons 12 No. of episodes 302 Production Executive producer (s) Simon Cowell Sam Donnelly Jason Raff Rob Wade Trish Kinane Richard Wallace Running time 44 -- 104 minutes Production company (s) FremantleMedia North America SYCOtv Distributor FremantleMedia Enterprises Release Original network NBC Picture format NTSC (480i) (2006 -- 08) HDTV 1080i (2009 -- present) Original release June 21, 2006 (2006 - 06 - 21) -- present (present) External links Official website www.nbc.com/americas-got-talent/
Document 10: American Idol: The fourteenth season premiered on January 7, 2015. Ryan Seacrest returned to host, while Jennifer Lopez, Keith Urban and Harry Connick, Jr. returned for their respective fourth, third and second seasons as judges. Eighth season runner-up Adam Lambert filled in for Urban during the New York City auditions. Randy Jackson did not return as the in-house mentor for this season.
Document 11: American Idol: The thirteenth season premiered on January 15, 2014, with Ryan Seacrest returning as host. Randy Jackson and Keith Urban returned, though Jackson moved from the judging panel to the role of in-mentor. Mariah Carey and Nicki Minaj left the panel after one season. Former judge Jennifer Lopez and former mentor Harry Connick, Jr. joined Urban on the panel. Also, Nigel Lythgoe and Ken Warwick were replaced as executive producers by Per Blankens, Jesse Ignjatovic and Evan Pragger. Bill DeRonde replaced Warwick as a director of the audition episodes, while Louis J. Horvitz replaced Gregg Gelfand as a director of the show.
Document 12: American Idol: American Idol employs a panel of judges who critique the contestants' performances. The original judges were record producer and music manager Randy Jackson, pop singer and choreographer Paula Abdul and music executive and manager Simon Cowell. The judging panel for the most recent season consisted of country singer Keith Urban, singer and actress Jennifer Lopez, and jazz singer Harry Connick, Jr. The show was originally hosted by radio personality Ryan Seacrest and comedian Brian Dunkleman, with Seacrest continuing on for the rest of the seasons.
Document 13: Britain's Got Talent (series 7): Series Seven of Britain's Got Talent, a British talent competition series, began broadcasting in the UK during 2013, from 13 April to 8 June on ITV; because of England's international friendly with the Republic of Ireland that year, the show took a break on 29 May to avoid clashing with live coverage of the match. Apart from filming of the Judges' auditions being pushed back to not conflict with the filming schedule of the host of Britain's Got More Talent, Stephen Mulhern, and Simon Cowell being unable to attend a day of auditions due to illness, no changes were to the hosts and the judges, all of whom returned for the show. However, the cash prize was reduced after the last series, from £500,000 to £250,000. The series is mainly notable for being the first one to be won by a foreign act, and for an incident that occurred during a performance by a finalist involving an individual who stormed the stage and pelted Cowell with eggs.
Document 14: American Idol: The show had originally planned on having four judges following the Pop Idol format; however, only three judges had been found by the time of the audition round in the first season, namely Randy Jackson, Paula Abdul and Simon Cowell. A fourth judge, radio DJ Stryker, was originally chosen but he dropped out citing "image concerns". In the second season, New York radio personality Angie Martinez had been hired as a fourth judge but withdrew only after a few days of auditions due to not being comfortable with giving out criticism. The show decided to continue with the three judges format until season eight. All three original judges stayed on the judging panel for eight seasons.
Document 15: Britain's Got Talent (series 11): Britain's Got Talent Series 11 Broadcast from 15 April -- 3 June 2017 Judges Simon Cowell Amanda Holden Alesha Dixon David Walliams Presenter (s) Ant & Dec (ITV) Co-presenter (s) Stephen Mulhern (ITV2) Broadcaster ITV ITV2 (BGMT) Venue Various (auditions) Elstree Studios (live shows) Winner Tokio Myers Origin London Genre (s) Pianist Runner - up Issy Simpson Chronology ◀ 2017 ▶
ground_truth: January 11, 2010
sub_queries: who is the creator of britain's got talent Answer: Simon Cowell
When did Simon Cowell announce he was no longer going to be a judge? Answer: January 11, 2010