Question: Among Seohyun and John S. Hall who worked with King Missile?

Context articles: Royal Lunch
King Missile (album)
Love Is... (song)
Chris Xefos
The Body Has a Head
John S. Hall
Mystical Shit
Seohyun
The Psychopathology of Everyday Life (album)
Roger Murdock (musician)

Royal Lunch is the ninth album by avant-garde band King Missile, and the band's third in its incarnation as "King Missile III."
 It was released on September 21, 2004.
King Missile is the sixth studio album by the avant-garde band King Missile.
 It was released in 1994 through Atlantic Records.
 The album is the band's third on the company.
"Love Is..." is a song by avant-garde band King Missile.
 It was the only single from the band's 1994 album "King Missile."
Christopher "Chris" Xefos (born January 5, 1964) is an American multi-instrumentalist musician/engineer/producer and former member of band King Missile.
 He plays various instruments such as accordion, bass, piano, and synthesizer, among others.
 He began recording/producing various groups in New York City during the 1980s, including indie-rock legends Phantom Tollbooth.
 In 1989, he joined the New York City avant-garde spoken word/art rock group, King Missile.
 Five years, four albums and a number of alternative rock “hits” (including “Jesus Was Way Cool” and “Detachable Penis”) later, King Missile disbanded (this version).
 Xefos also played with the group When People Were Shorter and Lived Near the Water during this time.
 Following this period, he relocated to San Francisco.
The Body Has a Head is an album by King Missile frontman John S. Hall, released exclusively in Germany in 1996.
 Though billed as a Hall "solo album," the collection features considerable input from multi-instrumentalists Sasha Forte, Bradford Reed, and Jane Scarpantoni, all of whom would become members of the next incarnation of King Missile ("King Missile III") and contribute to that group's "debut" album, 1998's "Failure."
John S. Hall (born John Charles Hall September 2, 1960) is an American poet, author, singer and lawyer perhaps best known for his work with King Missile, an avant-garde band that he co-founded in 1986 and has since led in various incarnations.
Mystical Shit is the third album by avant-garde band King Missile and the first of their albums to be released after the dissolution of the King Missile (Dog Fly Relgion) incarnation of the band.
 The album was first released in 1990 and was later included on the compilation album "Mystical Shit & Fluting on the Hump."
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.
The Psychopathology of Everyday Life is the eighth album by avant-garde band King Missile, and the band's second in its incarnation as "King Missile III."
 It was released on January 21, 2003.
 The album is named after a 1901 book by Sigmund Freud.
Roger Murdock is an American multi-instrumentalist and former member of avant-garde band King Missile.
 His primary role in King Missile was that of drummer, but he is also proficient at such instruments as guitar, piano, and Emulator.
 Murdock has performed and/or recorded with Joey Ramone, Ronnie Spector, Debbie Harry, Leslie West, The Martinets, The Messyheads, Wide Right, and Laurie and The Sighs, among others, and has toured extensively throughout the U.S. and the U.K.
 In addition to performing, Murdock has written or co-written for many of the bands in which he has played, and has composed incidental music for Off-Off-Broadway plays.