Question: Parrallel and Snowflake are EP's of what girl group? 

full_context: Document 1: Wonder Girls: Wonder Girls () was a South Korean girl group and band formed by producer Park Jin-young under JYP Entertainment in 2006, which debuted in 2007. The group's final line-up consisted of Yubin, Yeeun, Sunmi and Hyerim. Members Sunye and Sohee officially left the group in 2015, while Hyuna left in late 2007. They were co-managed in the United States by Creative Artists Agency.
Document 2: Oh My Girl discography: The discography of the South Korean girl group Oh My Girl consists of five extended plays, one repackage album, and seven singles. Oh My Girl was formed by the Korean entertainment company WM Entertainment in 2015. The group's debut mini album, "Oh My Girl", was released on April 20, 2015. On October 8, 2015, their second extended play entitled Closer was released. The group's third mini album, Pink Ocean was released on March 28, 2016 along with its lead single "Liar Liar". After almost 2 months, they released a repackage album of Pink Ocean, titled Windy Day with two additional tracks and a Chinese version of "Liar Liar". On August 1, 2016 they released Listen to My Word, a special summer album entitled containing four remake songs, including Papaya's "Listen to My Word (A-ing)" featuring Skull and Haha. The album topped the Korean Music chart which became their most selling album release.
Document 3: Replay (EP): "Replay" (Korean: 누난 너무 예뻐 ; lit: Noona (Older Girl) Is So Pretty) is the debut EP of South Korean boy group Shinee, released on May 22, 2008 from their label company, S.M. Entertainment. Their debut song, "누난 너무 예뻐 (Replay)" was created by music composer Yoo Young-jin with a contemporary, sophisticated R&B feel and rhythm. The EP consists of five tracks and debuted at #10 on the MIAK charts (Music Industry Association of Korea) and peaked at #8. The lead single, "Noona Neomu Yeppeo (Replay)", turned into a hit, especially with the adult female demographic because of its line about "Nuna (older sister), you’re so pretty". Rino Nakasone worked on the choreography for the title song. The Korean music video included f(x)'s Victoria as the female lead, while the song's Japanese music video featured YoonA of Girls' Generation.
Document 4: Pristin: Pristin (Hangul: 프리스틴 ; stylized as PRISTIN and formerly known as Pledis Girlz) is a South Korean girl group formed by Pledis Entertainment in 2016. The group is composed of ten members: Nayoung, Roa, Yuha, Eunwoo, Rena, Kyulkyung, Yehana, Sungyeon, Xiyeon and Kyla. Most of them appeared on the television show "Produce 101" and, as the prize for becoming two of the top contestants, Nayoung and Kyulkyung went on to debut as part of the project girl group I.O.I, before reuniting with the other members to debut as Pristin on March 21, 2017, with the first mini album "Hi! Pristin". Like their labelmate group Seventeen, Pristin is known for writing and composing their own music.
Document 5: GFriend: GFriend (Hangul: 여자친구 ; RR: "Yeoja Chingu " ) is a six-member South Korean girl group formed by Source Music in 2015. The group consists of Sowon, Yerin, Eunha, Yuju, SinB, and Umji. They made their debut with the EP "Season of Glass" on January 16, 2015. GFriend won several 2015 female rookie awards and has garnered momentum since their debut, despite coming from a small company. In 2016, they continued their success with their third EP "Snowflake" and won first place on many music shows with the title song "Rough". They released their first full-length album "LOL" in July 2016.
Document 6: Twice (band): Twice (; Japanese: トゥワイス) is a South Korean girl group formed by JYP Entertainment through the 2015 reality show "Sixteen". The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu. The group debuted on October 20, 2015 with the extended play (EP) "The Story Begins".
Document 7: Page Two (EP): Page Two is the second extended play (EP) by South Korean girl group Twice. The album was released digitally and physically on April 25, 2016 by JYP Entertainment and distributed by KT Music. It contains seven tracks, including the lead single, "Cheer Up". "Page Two" has the most first-week sales out of all K-pop girl group releases in 2016.
Document 8: Snowflake (EP): Snowflake is the third extended play (EP) by South Korean girl group GFriend. It was released by Source Music on January 25, 2016 and distributed by LOEN Entertainment. The album contains five songs, including the single "Rough", and two instrumental tracks. The album debuted at number two on the Gaon Album Chart and has sold more than 33,000 units. GFriend promoted the album with a series of televised live performances on South Korea's music shows, winning a total of 15 music show awards. "Rough" was also commercially successful, topping the Gaon Digital Chart and selling more than one million digital downloads. Musically, the album is similar in style to K-pop from the late 1990s and 2000s.
Document 9: I.O.I: I.O.I (; also known as IOI or Ideal of Idol) was a South Korean girl group formed by CJ E&M through the 2016 reality show "Produce 101" on Mnet. The group was composed of eleven members chosen from a pool of 101 trainees from various entertainment companies: Lim Na-young, Kim Chung-ha, Kim Se-jeong, Jung Chae-yeon, Zhou Jieqiong, Kim So-hye, Yu Yeon-jung, Choi Yoo-jung, Kang Mi-na, Kim Do-yeon and Jeon So-mi. They debuted on May 4, 2016 with the EP "Chrysalis" and actively promoted as a whole and as a sub-unit for less than a year.
Document 10: Love Yourself: Her: Love Yourself: 承 'Her' is the fifth extended play by South Korean boy group BTS. The EP was released on September 18, 2017 by Big Hit Entertainment. The album was released in four versions, and contains nine tracks with "DNA" as its lead single. In addition, there are two hidden tracks that are only available on the physical album.
Document 11: Twice discography: South Korea-based girl group Twice have released four extended plays (one of which was reissued under a different title), one compilation album, one compilation EP, and five singles. Formed by JYP Entertainment in 2015 through the survival show "Sixteen", Twice debuted in October 2015 with the release of their first EP, "The Story Begins", and its single "Like Ooh-Ahh". The EP and the single peaked at No. 3 and No. 10 on the Gaon Music Chart, respectively. "The Story Begins" eventually sold over 120,000 copies, becoming the best-selling debut extended play by a K-pop girl group of all time, breaking the record set by Girls' Generation's first extended play "Gee" (2009), which sold nearly 100,000 copies.
Document 12: Girls' Generation: Girls' Generation (), also known as SNSD, is a South Korean girl group formed by S.M. Entertainment. The group is composed of eight members: Taeyeon, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung, Yoona, and Seohyun. Originally a nine-piece group (with Jessica, who later departed from the group in September 2014), Girls' Generation debuted in 2007 with their Korean eponymous debut album. Though the album gained some attention, it was not until 2009 that the group rose to fame with the single "Gee", which claimed the top spot on KBS's "Music Bank" for a record-breaking nine consecutive weeks and was named the most popular song of the 2000s in South Korea by Melon. Girls' Generation further consolidated their popularity on the South Korean music scene with follow-up singles "Tell Me Your Wish (Genie)", "Oh!", and "Run Devil Run", which were released in mid-2009 and early 2010.
Document 13: Secret Garden (EP): Secret Garden is the third mini-album by South Korean girl group Apink, released on July 5, 2013. This is their first official release as six-member group and they returned after 14 months since they last promoted their last album "Unee Anee" with "Hush" and "Bubibu" in May 2012. They made first comeback stage on Mnet’s “M! Countdown" one day before the official release. The theme of the album is healing, aim to that will soothe the listeners’ eyes and ears. The album consist of five new songs including the title track “NoNoNo” produced by Shinsadong Tiger.
Document 14: Marti Pellow Sings the Hits of Wet Wet Wet &amp; Smile: Marti Pellow Sings the Hits of Wet Wet Wet &amp; Smile
Document 15: Parallel (EP): Parallel is the fifth extended play (EP) by South Korean girl group GFriend. The EP was released digitally and physically by Source Music on August 1, 2017 and distributed by LOEN Entertainment. The album contains eight songs, including the single "Love Whisper", and two instrumental tracks. It has sold over 60,000 physical copies as of August 2017. The extended play was re-released on September 13 under the title Rainbow with the single "Summer Rain" and a bonus track of the same name.
ground_truth: GFriend