Question: What is the nationality of the actress who plays Brittany in "Sexy"?

full_context: Document 1: Santana Lopez: Santana Lopez is a fictional character from the Fox musical comedy-drama series "Glee". The character is portrayed by actress Naya Rivera, and has appeared in "Glee" from its pilot episode, first broadcast on May 19, 2009. Santana was developed by "Glee" creators Ryan Murphy, Brad Falchuk and Ian Brennan. Introduced as a minor antagonist and a sidekick to Quinn Fabray (Dianna Agron) in first episode of "Glee", Santana's role grew over the course of the show's first season. In the second season, Rivera was promoted to series regular, and Santana was given more high-profile storylines, such as the development of her romantic feelings for her best friend Brittany Pierce (Heather Morris), and subsequent realization that she is a lesbian. Rivera, who has been vocally supportive of the love story between her and Morris' character, has received widespread praise for her portrayal of Santana, as well as for her for vocal work in numerous songs performed as part of the show's central glee club, New Directions.
Document 2: The Substitute (Glee): "The Substitute" is the seventh episode of the second season of the American television series "Glee", and the twenty-ninth episode overall. It was written by Ian Brennan, directed by Ryan Murphy, and premiered on Fox on November 16, 2010. The episode guest stars Gwyneth Paltrow as Holly Holliday, a substitute teacher who takes the place of glee club director Will Schuester (Matthew Morrison) while he is ill. Cheerleading coach Sue Sylvester (Jane Lynch) becomes principal of William McKinley High School, and glee club members Mercedes Jones (Amber Riley) and Kurt Hummel (Chris Colfer) experience tension in their friendship.
Document 3: Rachel Berry: Rachel Barbra Berry is a fictional character and "de facto" female lead from the Fox musical comedy-drama series "Glee". The character is portrayed by actress Lea Michele, and has appeared in "Glee" from its pilot episode, first broadcast on May 19, 2009. Rachel was developed by "Glee" creators Ryan Murphy, Brad Falchuk and Ian Brennan. She is the glee club star of the fictional William McKinley High School in Lima, Ohio, where the show is set. Her storylines have seen her suffer peer alienation due to her Broadway ambitions, and develop romantic feelings for Jesse St. James (Jonathan Groff), a member of rival glee club Vocal Adrenaline, but primarily for quarterback and glee club co-captain Finn Hudson (Cory Monteith), to whom she eventually becomes engaged.
Document 4: Brittany Pierce: Brittany Susan Pierce is a fictional character from the Fox musical comedy-drama series "Glee". The character is portrayed by actress Heather Morris, and first appeared in the show's second episode, "Showmance". Brittany was developed by "Glee" creators Ryan Murphy, Brad Falchuk, and Ian Brennan. In "Glee", Brittany is a cheerleader, or "Cheerio" for the fictional William McKinley High School, and a member of the school's glee club led by Will Schuester. Morris was originally hired to teach Beyoncé's "Single Ladies" dance to the "Glee" cast. The show at the time was looking for a third cheerleader, and Morris landed the role. Morris was upgraded to a series regular in the series' second season, in which Brittany is given a larger storyline, solos and dance routines to perform.
Document 5: Comeback (Glee): "Comeback" is the thirteenth episode of the second season of the American musical television series "Glee", and the thirty-fifth overall. It was written by series creator Ryan Murphy, directed by Bradley Buecker, and premiered on Fox on February 15, 2011. In the episode, glee club director Will Schuester (Matthew Morrison) allows cheerleading coach Sue Sylvester (Jane Lynch) to join the McKinley High glee club in an attempt to ease her depression. Club member Sam (Chord Overstreet) creates a tribute band to teen singer Justin Bieber in order to win the heart of Quinn (Dianna Agron), and is later joined by the group's other male members, minus co-captain Finn (Cory Monteith), to recreate Bieber's "Somebody to Love" and woo their significant others.
Document 6: Sexy (Glee): "Sexy" is the fifteenth episode of the second season of the American musical comedy-drama television series "Glee", and the thirty-seventh episode overall. It was written by Brad Falchuk, directed by Ryan Murphy, and first aired on the Fox network on March 8, 2011. The episode mainly revolves around the topics of sex and adolescent sexuality. In it, Holly Holliday (Gwyneth Paltrow) returns to McKinley High School as a substitute teacher in a class devoted to sex education. Glee club director Will Schuester (Matthew Morrison) begins to develop feelings for Holly, and guidance counselor and celibacy club advisor Emma Pillsbury (Jayma Mays) is less than pleased with Holly's lessons. Santana (Naya Rivera) expresses her love for Brittany (Heather Morris), and Burt Hummel (Mike O'Malley) has a talk with his son Kurt (Chris Colfer) about sex.
Document 7: Emma Pillsbury: Emma Pillsbury Schuester (previously Pillsbury-Howell) is a fictional character from the Fox musical comedy-drama series "Glee". Portrayed by actress Jayma Mays, Emma has appeared in "Glee" from its pilot episode, first broadcast on May 19, 2009. Emma was developed by "Glee" creators Ryan Murphy, Brad Falchuk and Ian Brennan. She is a guidance counselor at the fictional William McKinley High School in Lima, Ohio where the series is set. Emma suffers from obsessive-compulsive disorder and has romantic feelings for glee club director Will Schuester (Matthew Morrison), but becomes engaged to football coach Ken Tanaka (Patrick Gallagher) as Will is married. Ken ultimately breaks up with her on their wedding day because of her feelings for Will, and when Will leaves his wife Terri (Jessalyn Gilsig), he and Emma share a kiss. Their relationship is short-lived, and in the second season, Emma and her dentist boyfriend Carl Howell (John Stamos) marry in Las Vegas. The wedding is later annulled as it was unconsummated. At the beginning of the third season, she and Will are living together; they become engaged shortly after New Years, and consummate their relationship near the end of the school year. Emma leaves Will at the altar midway through the fourth season, but the two later reconcile and marry in the season finale. She becomes pregnant during the middle of the fifth season.
Document 8: Home (Glee): "Home" is the sixteenth episode of the American television series "Glee". The episode premiered on the Fox network on April 27, 2010. It was directed by Paris Barclay and written by series creator Brad Falchuk. "Home" sees new cheerleader Mercedes Jones (Amber Riley) deal with body image issues, while Kurt Hummel (Chris Colfer) sets his dad and Finn Hudson's mom together, in an attempt to get closer to Finn (Cory Monteith), and club director Will Schuester (Matthew Morrison) is reunited with his friend April Rhodes (Kristin Chenoweth). Chenoweth first appeared in "Glee" in the episode "The Rhodes Not Taken". She enjoyed the role of April so much that she agreed to return for "Home", and has expressed an interest in reappearing in the future.
Document 9: New York (Glee): "New York" is the twenty-second episode and season finale of the second season of the American musical television series "Glee", and the forty-fourth overall. The episode was written and directed by series creator Brad Falchuk, filmed in part on location in New York City, and first aired on May 24, 2011 on Fox in the United States. With a $6 million budget, it was reportedly the most expensive episode of "Glee" at the time of broadcast. It garnered a Primetime Emmy nomination for Outstanding Costumes for a Series. The episode features an appearance by Patti LuPone as herself and guest stars Jonathan Groff, Cheyenne Jackson, and Charice. The McKinley High School glee club, New Directions, performs at the National show choir competition in New York City and finishes in twelfth place. While they are there, the glee club members see the sights, including Times Square and Central Park. Rachel (Lea Michele) and Kurt (Chris Colfer) sing a song from a Broadway stage, as does their director, Will Schuester (Matthew Morrison).
Document 10: Britney 2.0: "Britney 2.0" is the second episode of the fourth season of the American musical television series "Glee", and the sixty-eighth episode overall. Written by Brad Falchuk and directed by Alfonso Gomez-Rejon, it aired on Fox in the United States on September 20, 2012, and features "Glee"'s second episode dedicated to the music of Britney Spears. This episode features, the New Directions attempting to cheer up a depressed Brittany Pierce (Heather Morris) with Britney Spears songs. Special guest star Kate Hudson returns as Rachel's dance instructor, Cassandra July.
Document 11: Naya Rivera: Naya Marie Rivera (born January 12, 1987) is an American actress and singer, known for playing Santana Lopez on Fox's musical comedy-drama television series "Glee". She also played the role of Hillary Winston on "The Royal Family" at the age of 4, for which she received a Young Artist Award nomination. Her first solo single "Sorry", featuring American rapper Big Sean, was released on September 17, 2013.
Document 12: Lea Michele: Lea Michele Sarfati ( ; born August 29, 1986) is an American actress, singer, songwriter and author. She began her career as a child actress on Broadway, appearing in productions of "Les Misérables", "Ragtime", "Fiddler on the Roof", and "Spring Awakening". Michele is known for playing Rachel Berry on the Fox series "Glee" (2009–2015), for which she received an Emmy Award nomination and two Golden Globe nominations. She earned three Grammy Award nominations for music she recorded for "Glee". She subsequently starred as Hester Ulrich on the Fox series "Scream Queens" (2015–2016). Michele is set to star as Valentina Barella on the upcoming ABC sitcom "The Mayor".
Document 13: Heather Morris: Heather Elizabeth Morris (born February 1, 1987) is an American actress, dancer, singer and model, known for her role as Brittany S. Pierce in the Fox musical comedy-drama series "Glee".
Document 14: Silly Love Songs (Glee): "Silly Love Songs" is the twelfth episode of the second season of the American musical television series "Glee", and the thirty-fourth overall. The Valentine's Day-themed episode was written by series creator Ryan Murphy, directed by Tate Donovan, and premiered on Fox on February 8, 2011. In this episode, Director Will Schuester (Matthew Morrison) assigns the McKinley High School glee club to perform love songs in honor of Valentine's Day. Club member Finn Hudson (Cory Monteith) sets up a kissing booth for the occasion, to take advantage of his rising popularity and raise money for the club. At the Dalton Academy, Blaine Anderson (Darren Criss) and the Dalton Academy Warblers make plans to perform a musical number outside of the campus, and Kurt Hummel (Chris Colfer) confesses his love for Blaine.
Document 15: Brittany Snow: Brittany Anne Snow (born March 9, 1986) is an American actress, producer, and singer.
ground_truth: American