Question: What was the name of the group in which one half of the duo Toheart debuted, the other being Woohyun from Infinite?

Context articles: Key (entertainer)
One half
Toheart (band)
Infinite (band)
Gimlet (cocktail)
Write.. (EP)
Fat Jon
Reversible process (thermodynamics)
Royce da 5'9&quot;
Unihemispheric slow-wave sleep

Kim Ki-bum (born September 23, 1991), better known by his stage name Key, is a South Korean singer, actor, fashion designer and television presenter.
 Born and raised in Daegu, South Korea, he later travelled to Seoul after a successful audition at the S.M. National Tour Audition Casting.
 In 2008, Key debuted as a member of South Korean boy group Shinee, who later went on to become one of the best-selling artists in Korea.
 Key is widely recognised as a singer, but he has also ventured into different careers, notably as an actor and fashion designer.
One half is the irreducible fraction resulting from dividing one by two (⁄ ), or the fraction resulting from dividing any number by its double.
 Multiplication by one half is equivalent to division by two, or "halving"; conversely, division by one half is equivalent to multiplication by two, or "doubling".
 One half appears often in mathematical equations, recipes, measurements, etc.
 Half can also be said to be one part of something divided into two equal parts.
Toheart (Korean:투하트, commonly stylized as ToHeart) is a South Korean duo formed by Woohyun from Infinite and Key from Shinee in 2014.
 It is a collaboration between S. M. Entertainment and Woollim Entertainment.
Infinite (Korean: 인피니트 ; stylized as INFINITE) is a South Korean boy band formed in 2010 by Woollim Entertainment.
 The group is composed of six members: Sungkyu, Dongwoo, Woohyun, Sungyeol, L, and Sungjong.
 Originally a seven-piece group (with Hoya, who later departed from the group in August 2017), Infinite debuted in 2010 with their mini album "First Invasion".
 Their first full album, "Over The Top", was released in July 2011.
 Their mini-album "New Challenge", released in March 2013, sold over 160,000 copies in South Korea alone and was one of the best-selling albums of 2013.
 Their second full album, "Season 2", was released in May 2014.
The gimlet (pronounced with a hard 'g') is a cocktail made of gin and lime juice.
 A 1928 description of the drink was: "gin, a spot of lime, and soda".
 The description in the 1953 Raymond Chandler novel "The Long Goodbye" stated that "a real gimlet is half gin and half Rose's lime juice and nothing else".
 This is in line with the proportions suggested by "The Savoy Cocktail Book" (1930) which specifies one half Plymouth Gin and one half Rose's Lime Juice Cordial.
 However, modern tastes are less sweet, and generally provide for at least two parts gin to one part of the lime and other non alcoholic elements (see recipes below).
Write.
.
 is the debut extended play by South Korean singer Woohyun.
 It was released by Woollim Entertainment on May 9, 2016.
 The EP marked the official solo debut of Woohyun, who had been known as a member of South Korean boy group Infinite for nearly six years.
Jon Marshall (born September 6, 1975), better known by his stage name Fat Jon the Ample Soul Physician, is an American hip hop producer and rapper from Cincinnati, Ohio.
 He is a member of the American hip-hop group Five Deez.
 He is also one half of 3582 with J. Rawls, one half of Rebel Clique with vocalist Amleset Solomon, and one half of Beautiful Killing Machine with Sonic Brown of Five Deez.
 Fat Jon is also credited as part of the production team that scored the music for the anime series "Samurai Champloo".
 He currently resides in Frankfurt, Germany.
In thermodynamics, a reversible process is a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, with no increase in entropy.
 Throughout the entire reversible process, the system is in thermodynamic equilibrium with its surroundings.
 Since it would take an infinite amount of time for the reversible process to finish, perfectly reversible processes are impossible.
 However, if the system undergoing the changes responds much faster than the applied change, the deviation from reversibility may be negligible.
 In a "reversible cycle", a cyclical reversible process, the system and its surroundings will be returned to their original states if one half cycle is followed by the other half cycle.
Ryan Daniel Montgomery (born July 5, 1977), better known by his stage name Royce da 5′9″, is an American rapper from Detroit, Michigan.
 He is best known for his longtime association with Eminem as well as his solo career, recording primarily with producers Carlos "6 July" Broady and DJ Premier, as well as ghostwriting for the likes of Diddy and Dr. Dre.
 Royce is one half of the rap duo Bad Meets Evil with Eminem, one quarter of the hip hop group Slaughterhouse with Joe Budden, Joell Ortiz and Crooked I, and one half of the hip hop group PRhyme with DJ Premier.
 The editors of About.com ranked him No. 30 on their list of the Top 50 MCs of Our Time (1987–2007).
Unihemispheric slow-wave sleep (USWS) is sleep with one half of the brain while the other half remains alert.
 This is in contrast to normal sleep where both eyes are shut and both halves of the brain show reduced consciousness.
 In USWS, also known as asymmetric slow-wave sleep, one half of the brain is in deep sleep, a form of non-rapid eye movement sleep and the eye corresponding to this half is closed while the other eye remains open.
 When examined by low voltage electroencephalography (EEG), the characteristic slow-wave sleep tracings are seen from one side while the other side shows a characteristic tracing of wakefulness.
 The phenomenon has been observed in a number of terrestrial, aquatic and avian species.