Question: Who is from farther west, Luna or Janet Gardner?

full_context: Document 1: Im Yoon-ah: Im Yoon-ah (Hangul: 임윤아 ; born May 30, 1990), better known by the mononym Yoona, is a South Korean singer and actress. She debuted as a member of girl group Girls' Generation in August 2007, who went on to become one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide.
Document 2: Tangerine (Vixen album): Tangerine is the third album by American hard rock band Vixen. It was recorded without contributions from former members Jan Kuehnemund and Share Pedersen. The line-up for this album consisted of Janet Gardner and Roxy Petrucci. "Tangerine" has a different sound from the music of the previous albums of the band, more similar to Grunge than glam metal.
Document 3: Elena Siegman: Elena Siegman is an American singer, guitarist, songwriter and video game producer from Los Angeles. She moved to Boston, and is the former lead guitarist and one of the founders of an all-girl punk band named Vagiant, now known as Tijuana Sweetheart. As of January 2012, she sings in the Boston-based rock band "BrownBoot". (Metal Bands)
Document 4: Luna (singer): Park Sun-young (born August 12, 1993), better known by her stage name Luna, is a South Korean singer, actress and presenter. She is best known as the main vocalist and lead dancer of South Korean girl group f(x). Luna made her solo debut with the extended play "Free Somebody" on May 31, 2016.
Document 5: Luna discography: Luna (born Park Sun-young) is a South Korean singer, best known as a member of girl group f(x). Since 2009, she has released one extended play, twelve singles (including six collaborations and four as a featured artist), and fourteen soundtrack appearances. Her career as a solo artist began in May, 2016, with the release of her debut extended play, "Free Somebody".
Document 6: Janet Jackson: Janet Damita Jo Jackson (born May 16, 1966) is an American singer, songwriter, dancer and actress. Known for sonically innovative, socially conscious, and sexually provocative records, elaborate stage shows, and high-profile television and film roles, she has been a prominent figure in popular culture for over 30 years.
Document 7: Sunye: Min Sun-ye (Korean: 민선예, born August 12, 1989), also known as Sunye or Sun (stylized as SunYe), is a South Korean missionary and former singer and actress (on hiatus). She is the former leader and main vocalist of the Wonder Girls.
Document 8: Seo Yu-na: Seo Yu-na (born December 30, 1992), better known by the mononym Yuna, is a South Korean singer and actress. She is a member of the South Korean girl group AOA and its sub-groups, AOA Black and AOA Cream.
Document 9: Janet Gardner: Janet Patricia Gardner (born March 17, 1962 in Juneau, Alaska) is an American rock singer. She is best-known as the lead singer and rhythm guitarist of the all-woman hard rock band Vixen.
Document 10: Park Gyu-ri: Park Gyu-ri (born May 21, 1988), better known by the mononym Gyuri, is a South Korean singer, actress, and radio personality. She was a member of South Korean girl group Kara.
Document 11: Ann Wilson: Ann Dustin Wilson (born June 19, 1950) is an American musician, best known as the lead singer and songwriter of the hard rock band Heart. Wilson was listed as one of the "Top Heavy Metal Vocalists of All Time" by "Hit Parader" magazine in 2006. Wilson has a dramatic soprano vocal range.
Document 12: Seohyun: Seo Ju-hyun (born June 28, 1991), known professionally as Seohyun, is a South Korean singer and actress. She debuted as a member of girl group Girls' Generation (and later its subgroup TTS) in August 2007, who went on to be one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide. Apart from her group's activities, she has established herself as an actress, notably through her participation in the original and Korean versions of stage musicals including "Moon Embracing the Sun", "Gone with the Wind" and "Mamma Mia". She also starred in the drama "". She debuted as a solo artist with her debut mini album, "Don't Say No", on January 17, 2017, making her the third Girls' Generation member to debut as a solo artist.
Document 13: Suran (singer): Shin Su-ran (Hangul: 신수란), also known by her stage names Elena (Hangul: 엘에나) and Baily Shoo (Hangul: 베일리 슈), and better known by the mononym Suran (Hangul: 수란), is a South Korean singer-songwriter and record producer. She debuted as part of the duo, Lodia, on July 9, 2014, with the single "I Got A Feeling". In 2017, she has also appeared on MBC's "King of Mask Singer" (episodes 93–94) as a contestant named "Skip to the End, Hello".
Document 14: Joan Jett: Joan Marie Larkin (born September 22, 1958), known professionally as Joan Jett, is an American rock singer, songwriter, composer, musician, record producer and occasional actress.
Document 15: L7 discography: The discography of the rock band L7. L7 was formed by Donita Sparks and Suzi Gardner on shared electric guitar and shared vocals in 1985. A year prior, Gardner had performed backing vocals on the Black Flag song "Slip It In". The band also consisted of bassist Jennifer Finch and drummer Roy Koutsky (who was in the band for a year and a half). After their debut the band recruited Demetra Plakas as their permanent drummer. This line up continued through their albums, Smell the Magic in 1990 with Subpop records, with signing to the record label Slash the band had recorded three albums, Bricks Are Heavy in 1992, and Hungry for Stink in 1994. By the time 1996 came around Finch had wanted to leave. While the band was preparing to record their next album. Greta Brink had taken over bass for the new album, . Which was released in 1997. Gail Greenwood took over as their bassist for their final album, Slap-Happy which was produced by their own record company, Wax Tadpole records. After this the band started to break up when Greenwood left the band. Janis Tanaka had taken over bass. However the band ended up going into an hiatus, in 2001.
ground_truth: Janet Patricia Gardner