Question: Which band formed first, Bikini Kill or Scarling.?

Context paragraphs:
Scarling.: Scarling.  is an American noise pop band from Los Angeles, whose core members are Jessicka and Christian Hejnal-Addams.  The band formed in 2002.  They have released two albums, "Sweet Heart Dealer" and "So Long, Scarecrow".

Reject All American: Reject All American is the final studio album by the American punk rock band Bikini Kill, released on April 5, 1996 by Kill Rock Stars.  The album received generally favorable reviews from music critics.

Emily's Sassy Lime: Emily's Sassy Lime (a palindrome) was an all-Asian American teenage riot grrrl trio from Southern California, formed in 1993 by Wendy and Amy Yao, and Emily Ryan.  According to Experience Music Project, they formed after sneaking out of their homes one night to see a Bikini Kill and Bratmobile show, striking up a correspondence with Molly Neuman, the drummer of the latter band.  They didn't live very close to each other and didn't have cars, so they often had to write their songs over the phone, sometimes leaving seminal ideas for tunes, jingles, and melodies on each other's answering machines.  When they finally did have a chance to record, they did so on a singalodeon, a cheap off-the-shelf lo-fi tape recorder.  They barely ever practiced (often forbidden from doing so by their parents who considered their studies a bigger priority), making their sound a random, spontaneous indie garage punk-noise collage of "Whatever, just play."  They didn't have their own instruments for years, so with every show they played, they had to borrow someone else's in the DIY punk spirit of sharing, often swapping with each other carelessly and making every show sound totally different.

The Singles (Bikini Kill album): The Singles is a compilation album of three singles by punk rock band Bikini Kill.  The album was released in 1998 by Kill Rock Stars.  Joan Jett produces, plays guitar and sings on the first three tracks.

Bikini Kill (EP): Bikini Kill is the first EP by the American punk rock band Bikini Kill led by singer Kathleen Hanna.  The six-song vinyl EP was released in 1992 on Kill Rock Stars.  It was produced by Fugazi's Ian MacKaye.  In 1994, the EP was released on CD together with the "Yeah Yeah Yeah Yeah" EP under the name "The CD Version of the First Two Records".

The Frumpies: The Frumpies were a lo-fi punk rock band formed in 1992 Olympia, Washington.  The original line-up consisted of singers/guitarists Tobi Vail, Kathi Wilcox, and Billy Karren (all of whom were previously part of the legendary Riot Grrrl band Bikini Kill), and Bratmobile drummer Molly Neuman.  Their debut was the 7-inch single "Alien Summer Nights" on the Chainsaw label.  "Babies and Bunnies" was recorded in 1993, with future Make-Up and Weird War bassist Michelle Mae signing on long enough to record "Tommy Slich."  After a two-year hiatus, the Frumpies reunited in 1996, soon releasing the album "Eunuch Nights".  The CD collection "Frumpie One Piece" assembled all of the band's previous singles.  The group seemed to have disappeared after the 2000 EP release, "Frumpies Forever."

Le Tigre: Le Tigre ( ) is an American electroclash band from the United States, formed by Kathleen Hanna (formerly of Bikini Kill) and Johanna Fateman in 1998 in New York City.  It also featured Sadie Benning from 1998 until 2001 and JD Samson for the rest of the group's run.  Le Tigre is known for its left-wing sociopolitical lyrics, dealing with issues of feminism and the LGBT community.

Bikini Kill: Bikini Kill was an American punk rock band formed in Olympia, Washington, in October 1990.  The group consisted of singer and songwriter Kathleen Hanna, guitarist Billy Karren, bassist Kathi Wilcox, and drummer Tobi Vail.  The band is widely considered to be the pioneer of the riot grrrl movement, and was known for its radical feminist lyrics and fiery performances.  Their music is characteristically abrasive and hardcore-influenced.  After two full-length albums, several EPs and two compilations, they disbanded in 1997.

Pussy Whipped: Pussy Whipped is the debut studio album by American punk rock band Bikini Kill.  It was released on Kill Rock Stars on October 26, 1996.  It includes the track "Rebel Girl", which is number 27 on the "Rolling Stone" list of "Most Excellent Songs of Every Year Since 1967", a playlist assembled by the magazine in 2006 to celebrate its 1,000th issue.

Frau (band): Frau is a all-female hardcore feminist punk band from London.  Billboard magazine named them one of "20 All-Female Bands You Need To Know"; rock critic Maria Sherman compares their sound to Bikini Kill.  The punkzine Maximumrocknroll describes the band's highly charged and frantic sound as equal to the flippant swagger of Teenage Jesus and the Jerks.  Ashley Holland of the band, who also plays with Personnel and Good Throb, states that Frau seldom plays with other hardcore bands because the hardcore punk scene does not take female musicians seriously.  In addition to Holland, the other members of the band are Colette Rosa who sings in all female punk band Woolf, Paula and Núria who also played in the Barcelona band Las Timidas.  The band's sound has been noted for the use of intense distortion with powerful, forceful vocals.

Supporting paragraphs: Bikini Kill Scarling.
Answer: Bikini Kill