Question: What month did Einstein's performer win?

full_context: Document 1: American Idol: Ruben Studdard emerged as the winner, beating Clay Aiken by a small margin. Out of a total of 24 million votes, Studdard finished just 134,000 votes ahead of Aiken. This slim margin of victory was controversial due to the large number of calls that failed to get through. In an interview prior to season five, executive producer Nigel Lythgoe indicated that Aiken had led the fan voting from the wildcard week onward until the finale.
Document 2: Hello (Kelly Clarkson song): "Hello" is a song by American recording artist Kelly Clarkson, from her fifth studio album, "Stronger" (2011). Written by Clarkson, Josh Abraham, Oliver Goldstein, and Bonnie McKee, with production by Abraham and Oligee, "Hello" is a midtempo rock song about searching for companionship in hopes of not being lonely, in which the singer asks, "Hello? Is anybody listening?"
Document 3: American Idol: Both finalists found success after the show, but Aiken out-performed Studdard's coronation song "Flying Without Wings" with his single release from the show "This Is the Night", as well as in their subsequent album releases. The fourth-place finisher Josh Gracin also enjoyed some success as a country singer.
Document 4: Stronger (What Doesn't Kill You): ``Stronger (What Does n't Kill You) ''is a song by American recording artist Kelly Clarkson and the titular song from her fifth studio album, Stronger (2011). Originally titled as`` What Does n't Kill You (Stronger)'', the song served as the album's second single on January 17, 2012 through RCA Records. Written by Jörgen Elofsson, Ali Tamposi, and David Gamson, with additional writing and production by Greg Kurstin, ``Stronger ''is an uptempo song which draws from the genres of dance - pop and electropop. Its lyrical content mainly explores themes of empowerment and recovery following a heartbreak, with the chorus inspired by a Friedrich Nietzsche quotation:`` That which does not kill us makes us stronger.''
Document 5: Evelyn Einstein: Einstein was born in Chicago; after her birth she was adopted by Hans Albert Einstein. Towards the end of her life, she recounted that as a child she was told she was an illegitimate daughter of Albert Einstein and a ballet dancer; however, she had no documentation supporting this claim. She obtained a Master's degree in Medieval literature at University of California, Berkeley. She was married to Grover Krantz for 13 years from 1964 to about 1977. She then worked briefly as an animal control officer, as a cult deprogrammer, and as a Berkeley, California, reserve police officer.
Document 6: American Idol: In what was to become a tradition, Clarkson performed the coronation song during the finale, and released the song immediately after the season ended. The single, "A Moment Like This", went on to break a 38-year-old record held by The Beatles for the biggest leap to number one on the Billboard Hot 100. Guarini did not release any song immediately after the show and remains the only runner-up not to do so. Both Clarkson and Guarini made a musical film, From Justin to Kelly, which was released in 2003 but was widely panned. Clarkson has since become the most successful Idol contestant internationally, with worldwide album sales of more than 23 million.
Document 7: American Idol: In the May 23 season finale, Jordin Sparks was declared the winner with the runner-up being Blake Lewis. Sparks has had some success as a recording artist post-Idol.
Document 8: American Idol: The final showdown was between Justin Guarini, one of the early favorites, and Kelly Clarkson. Clarkson was not initially thought of as a contender, but impressed the judges with some good performances in the final rounds, such as her performance of Aretha Franklin's "Natural Woman", and Betty Hutton's "Stuff Like That There", and eventually won the crown on September 4, 2002.
Document 9: I Am Albert Einstein: I Am Albert Einstein is a children's book written by Brad Meltzer in the "Ordinary People Change the World" series. It follows the adventures of a young Albert Einstein learning important lessons.
Document 10: Kelly Clarkson: Kelly Brianne Clarkson (born April 24, 1982) is an American singer and songwriter. She rose to fame in 2002 after winning the inaugural season of the television series American Idol, which earned her a record deal with RCA Records. Clarkson's debut single, ``A Moment Like This '', topped the US Billboard Hot 100 chart and became the country's best - selling single of 2002. It was followed by the release of her debut album, Thankful (2003), which debuted atop the US Billboard 200. Trying to reinvent her image, Clarkson decided to part ways with Idol management and her second album, Breakaway (2004), featured a pop rock sound. It sold over 12 million copies worldwide and earned Clarkson two Grammy Awards.
Document 11: Elsa Einstein: In 1933, Albert and Elsa Einstein emigrated to Princeton, New Jersey, US. In autumn 1935, they moved to a house at 112 Mercer Street, bought that August, but shortly afterwards Elsa developed a swollen eye and was diagnosed with heart and kidney problems. When Elsa was diagnosed, Einstein decided to spend much of his time in his studies. It was stated in Walter Isaacson's book, Einstein: His Life and Universe, that he believed "strenuous intellectual work and looking at God's nature are the reconciling, fortifying yet relentlessly strict angels that shall lead me through all of life's troubles". Thus did Einstein try to escape from his troubles by focusing on work that would distract him from Elsa's dying. Elsa died after a painful illness on December 20, 1936, in the house on Mercer Street.
Document 12: E=MC² (Mariah Carey album): E=MC² is the eleventh studio album by American singer and songwriter Mariah Carey. It was released in the United States on April 15, 2008 by Island Records. The singer began recording the album in 2007 in Anguilla, after writing and composing most of its material during and after her 2006 Adventures of Mimi Tour. Carey worked with several notable songwriters and producers during the course of the project, including Jermaine Dupri, Bryan-Michael Cox, Stargate, The-Dream, Tricky Stewart, Scott Storch and Danja.
Document 13: Justin Guarini: Justin Guarini (born Justin Eldrin Bell; October 28, 1978) is an American singer / musician, actor, host and producer, who in 2002 was the runner - up on the first season of American Idol.
Document 14: Einstein (song): "Einstein" is a song by American recording artist Kelly Clarkson, from her fifth studio album, "Stronger" (2011). Originally titled as "Dumb + Dumb = You", "Einstein" was written by Clarkson, Toby Gad, Bridget Kelly, and James Fauntleroy II, with Gad handling the production. Lyrically, the song is written in a woman's first-person narrative about her acquiescence and infuriation towards her ex-lover, whom she described in the song as "dumb". Written in wordplay, it uses various mathematical-related equations and topics as rhetorical devices to describe their relationship, notably referencing the German-born physicist Albert Einstein in a metaphorical lyric, which led to the song being named after him.
Document 15: Since U Been Gone: "Since U Been Gone" is a song recorded by American singer Kelly Clarkson from her second studio album, "Breakaway" (2004). The song, which was written and produced by Max Martin and Lukasz "Dr. Luke" Gottwald, was released as the lead single from "Breakaway" two weeks before the album was released. It is an uptempo pop rock and power pop power ballad that infuses electronic sound with a mixture of soft and loud alternative rock sound. Martin originally wrote "Since U Been Gone" with Pink in mind but she turned it down. It was then given to Hilary Duff but she rejected the song because she could not reach its higher notes. The song was finally given to Clarkson after Clive Davis convinced the writers to give it to her. Clarkson decided to add heavier guitars and harder drums to the song after noticing that the demo had an obvious pop sound. Lyrically, the song is written from a woman's point of view where she expresses her sense of relief with the end of her troubled relationship.
ground_truth: September
sub_queries: Einstein >> performer Answer: Kelly Clarkson
What month did Kelly Clarkson win? Answer: September