Question: Who left the group that the "Saxuality" solo artist is in, in 2017?
Context: 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. Henry Santos (born Henry Santos Jeter on December 15, 1979) is a Dominican artist.  Best known for his tenure as a singer and songwriter in the bachata supergroup Aventura, Henry Santos is a Dominican vocalist from New York City, who made his debut as a solo artist in 2011.  Born Henry Santos Jeter, December 15, 1979, in Moca, Espaillat, Dominican Republic, he moved with his family to the Bronx, NY, at age of 13.  He is cousin of bachata star Romeo Santos, with whom he co-founded Aventura in 1996.  Originally known as "Los Tinelles", the group made its full-length debut with “Trampa De Amor” in 1998.  Aventura became recognized worldwide with the smash hit "Obsesión" from their third album, We Broke The Rules (2002).  Aventura’s success was elevated by "Ella Y Yo", a collaboration with the reggaeton artist Don Omar from their fifth Studio album God’s Project (2005).  It was the first of ten straight top ten hits on the Billboard Hot Latin Songs chart.  After nine albums (six studio and three live efforts) Aventura announced their separation in 2011.  Later that year, Henry Santos & Romeo released solo albums.  Introducing Henry Santos (2011) debuted number 2 on the Billboard Tropical Albums Chart.  Hits such as ‘Poquito A Poquito’, ‘Por Amor (Mi Fiel Fanatica)’ and ‘Por Nada’ were favorites among worldwide bachata listeners.  His second studio album Henry Santos My Way (2013) positioned two number-one hits on Billboard’s Tropical Songs Chart with "My Way" and “La Vida“.  In 2015, after the disappearance of Siente Music, the label that represented Santos (collaboration between Venemusic & Universal Music Group), Henry continued his independent solo career under his own record label (Hustlehard Entertainment LLC) releasing two successful productions: Henry Santos The Third Deluxe (2016), with the hits “Y Eres Tan Bella“, “Quédate”, “Cuídame”, “ Ella Me Dijo” and “Si Me Besa Tu Boca”, ranking at number 8 on iTunes’ Latin Albums Chart & number 4 on Amazon, and Henry Santos The Live Album, Sólo Éxitos (2017).  This is a Live Album compilation of all Henry Santos hits, including all the hits he penned for legendary latin Grupo Aventura.  From Henry Santos' solo breakout hit "Poquito A Poquito" to one of the most popular Grupo Aventura tracks performed at 2011's Festival Viña Del Mar "Nueve & Quince", we’re are able to relive all the glorious moments of Henry Santos' 20-year music career.  Hits like "Deja Vú", "Bésame Siempre", "Cuídame" & "Trece Días (Migajitas De Amor)", reminds us why Henry Santos is known as one of the original Kings Of Modern Bachata.” What's Left of Me is the second solo album by American singer-songwriter Nick Lachey, released on May 9, 2006.  The album includes the hit ballad "What's Left of Me", which to date is Lachey's most successful single as a solo artist.  Other singles included are titled "I Can't Hate You Anymore" and "Resolution".  On June 14, 2006, "What's Left of Me" was certified Gold by the Recording Industry Association of America for shipments of over 500,000 copies and has sold 441,982 to date, making it the first Lachey solo album to be certified by the RIAA.  Lachey embarked on the What's Left of Me Tour in support of the album. The Ladies of Soul are a Dutch supergroup consisting of Candy Dulfer, Berget Lewis, Glennis Grace and Edsilia Rombley.  Trijntje Oosterhuis, also a founding member, left in 2017 to focus on her solo-career. Kang Hee-gun (; born February 24, 1978), better known by his stage name Gary (Korean: 개리 , often spelled as Garie), is a South Korean rapper, songwriter, record producer, entrepreneur, and television personality.  Besides a solo artist, he is also the rapper and lyricist of the former hip-hop duo Leessang.  Since their formation in 2002, the group has produced a total of eight albums and had several hits under their belt.  In 2014, Gary made his debut as a solo artist with the mini-album "Mr.Gae".  Despite the album being banned by all major TV broadcast stations for its 19+ content, his songs still managed to top several charts.  He and long time collaborator Jung In later went on to form the duo, Jung In & Gary.  The two released the singles "Your Scent" and "Bicycle." Candy Dulfer (born 19 September 1969) is a Dutch smooth jazz, funk alto saxophonist and occasional singer who began playing at the age of six.  She founded her band, Funky Stuff, when she was fourteen years old.  Her debut album "Saxuality" (1990) received a Grammy nomination.  Dulfer has released eleven studio albums, two live albums, and one compilation album.  She has performed and recorded songs with musicians including her father Hans Dulfer, Prince, Dave Stewart, Van Morrison, and Maceo Parker, and has performed live with Alan Parsons (1995), Pink Floyd (1990), and Tower of Power (2014).  She hosted the Dutch television series "Candy meets..." (2007), in which she interviews fellow musicians.  In 2013 she became a judge in the fifth season of the Dutch version of "X Factor". American recording artist Kelly Rowland has embarked on eight concert tours during her career, six of which as a solo artist, including three of her own, two as a collaborative act and one as an opening act.  In her six solo live tours and notable events dates, she has performed as a solo singer in over 119 shows in six continents through twenty-one countries: in Asia (China, Japan, Philippines, Vietnam, Malaysia, Singapore), in Africa (Nigeria), in Europe (Germany, United Kingdom, France, Italy, Netherlands, Belgium, Switzerland, Denmark, Monaco), in North America (United States, Canada and The Bahamas), in South America (Brazil) and in Oceania (Australia, and the US State of Hawaii).  Throughout a career spanning 18 years, Rowland has sold over 40 million records as a solo artist with four studio albums, two compilation albums, one box set, two extended plays and forty-three singles, including nineteen as a featured artist and five promotional singles, and a further 60 million records with Destiny's Child.  Her work has earned her several awards and nominations, including four Grammy Awards, a Billboard Music Award and a Soul Train Music Award.  Rowland has also received a star on the Hollywood Walk of Fame with Destiny's Child, and as a solo artist she has been honored by the American Society of Composers, Authors and Publishers and "Essence" for her contributions to music.  In 2014, Fuse ranked Rowland in their "100 Most Award-Winning Artists" list at number 20. American singer and songwriter Beyoncé has released six studio albums, four live albums, three compilation albums, five EPs, one soundtrack album, one mixtape, two karaoke albums, and 62 singles (including 12 as a featured artist, nine promotional singles and five charity singles).  She has sold 100 million records as a solo artist, and a further 60 million with Destiny's Child, making her one of the best-selling music artists of all time.  The Recording Industry Association of America (RIAA) recognized her as the Top Certified Artist of the 2000s decade.  As of June 2016, in the United States, Beyoncé has sold 17.2 million albums as a solo artist, and a further 17 million albums as part of Destiny's Child. Fernando Varela (born May 1, 1980) is an American operatic and classical crossover tenor, who has performed in staged operas, as a member of the classical crossover trio Forte Tenors, and as a solo artist.  As a solo artist, he has toured internationally with David Foster, and also tours independently, having completed a European tour in 2016.  In 2017, Varela debuted his PBS special "Fernando Varela: Coming Home" and joins Sarah Brightman on the Royal Christmas Gala tour November - December, 2017. The Itals are a Jamaican reggae vocal group formed in 1976 by Alvin "Keith" Porter, Lloyd Ricketts, and Ronnie Davis (currently a member of The Tennors), all of whom had previously also recorded as solo artists.  All three had worked together in the late 1960s in The Westmorelites.  The group recorded several albums through the late 1970s and 1980s, with Ronnie Davis going on to a successful solo career in 1997 as Ronnie Davis and Idren.  The Itals' debut single, "In A Dis Ya Time", is regarded as the group's finest work, and topped the Jamaican chart.  1987's "Rasta Philosophy" was nominated for a Grammy Award as Best Reggae Album.  The line-up has changed over the years, with former solo artist David Isaacs joining in 1987 when Ricketts was sentenced to a prison term, preventing him from travelling to the United States.  Davis left the group in 1994, and was replaced by Porter's daughter Kada.  The Itals continued to tour in 2009 in support of the newly released "Let Them Talk".  In 2011 original member Lloyd Ricketts was able to obtain a work permit and performed two shows with Keith and Ronnie before his death.  Ronnie Davis stepped away from The Itals again in 2012 and reunited with the Rocksteady group The Tennors, but Keith continues to tour with two of his children, Darien Porter and Kada Porter, providing harmonies.  Keith will be releasing "Mind Over Matter", the remastered compilation of 22 early Itals songs and a solo album of reggae covers of classic R&B songs, called "Let's Get it On" in July 2015.
Answer: Trijntje Oosterhuis