Question: What profession Yeo Hoon-min and Bill Champlin have in common?

full_context: Document 1: Robert Lamm: Robert William Lamm (born October 13, 1944) is an American keyboardist, singer and songwriter who came to fame as a founding member of the pop rock band Chicago. He wrote many of the band's biggest hits, including "Questions 67 & 68", "Does Anybody Really Know What Time It Is?", "Beginnings", "25 or 6 to 4", "Saturday in the Park", "Dialogue (Part I & II)" and "Harry Truman".
Document 2: ₩uNo: Woo Ji-seok (Korean: 우지석 ; born May 11, 1990), commonly known as Taewoon or ₩uNo is a South Korean singer, rapper, songwriter, and record producer. He is a former member of the South Korean boy band Speed and former member of the South Korean Coed group Coed School.
Document 3: Tamara Champlin: Tamara Champlin is an American singer-songwriter who started her career as a session singer in Houston, Texas, later moving to Los Angeles. She has performed with and written for singers such as Elton John, Leon Russell, Nicky Hopkins, Andreas Carlsson, husband Bill Champlin and son Will Champlin. Tour Dates from 2010-2016 with Bill Champlin included California, Europe, Hawaii, Japan, South America, Kuwait and Iraq ; she is a full member of the Sons of Champlin, active in the Rhythmic Arts Project to benefit children, and the Saving K-9 Lives Charity encouraging adoption of shelter pets.
Document 4: Bill Champlin: William Bradford "Bill" Champlin (born May 21, 1947 in Oakland, California) is an American singer, guitarist, keyboard player, arranger, producer, and songwriter. His performance work is principally associated with the bands Chicago and the Sons of Champlin. He has won multiple Grammy Awards for songwriting.
Document 5: Suho: Kim Jun-myeon (born (1991--) 22, 1991 ), better known by his stage name Suho (meaning "guardian" in Korean), is a South Korean singer and actor. He is a member and leader of the South Korean-Chinese boy group EXO and its sub-unit EXO-K.
Document 6: Here in My Heart (Chicago song): ""Here in My Heart" is a 1997 song written by Glen Ballard and James Newton Howard and performed by Chicago. Keyboardist Bill Champlin sings lead, with bassist Jason Scheff singing the bridge. It was one of two new songs from the band's "The Heart of Chicago 1967-1997" CD. "Here in My Heart" was the group's eighth and final number one on the Billboard Adult Contemporary chart, and the track also reached #59 on the Hot 100 Airplay chart.
Document 7: Fee Waybill: John Waldo "Fee" Waybill (born September 17, 1950 in Omaha, Nebraska), is the lead singer and songwriter of the band The Tubes. Waybill has also worked with other acts, including Toto, Richard Marx, and projects headed by Billy Sherwood.
Document 8: Moon Hee-joon: Moon Hee-joon (; or spelled Moon Hee-jun; born March 14, 1978) is a South Korean pop-rock singer-songwriter signed under SidusHQ. He initially rose to fame as the leader of former boy band H.O.T. under SM Entertainment.
Document 9: Billy Gibbons: William Frederick Gibbons (born December 16, 1949) is an American musician, singer, songwriter, producer, and actor, best known as the guitarist and lead vocalist of the American rock band ZZ Top. He began his career in the Moving Sidewalks, who recorded "Flash" (1968) and opened four dates for the Jimi Hendrix Experience. Gibbons formed ZZ Top in late 1969 and released "ZZ Top's First Album" in 1971. The albums that followed, "Rio Grande Mud" (1972) and "Tres Hombres" (1973), along with extensive touring, solidified the group's reputation as a hard-rocking power trio.
Document 10: Sons of Champlin: The Sons of Champlin is an American rock band, formed in the late 1960s and from Marin County in the San Francisco-Bay area. They are fronted by vocalist/keyboardist/guitarist Bill Champlin, who was also a member of the rock band Chicago. They brought to the late 60's music scene in the Bay Area a soulful sound built around a horn section, sophisticated arrangements, philosophical themes, Bill Champlin's songwriting and blue-eyed soul singing, and Terry Haggerty's jazz-based guitar. They are one of the 1960s San Francisco bands, along with Jefferson Airplane, The Grateful Dead and  Moby Grape.
Document 11: Billy Corgan: William Patrick "Billy" Corgan Jr. (born March 17, 1967) is an American musician, songwriter, producer, poet, and entrepreneur. He is best known as the lead singer, primary songwriter, guitarist, and sole permanent member of The Smashing Pumpkins. Formed by Corgan and guitarist James Iha in Chicago, Illinois, in 1988, the band quickly gained steam with the addition of bassist D'arcy Wretzky and drummer Jimmy Chamberlin. Strong album sales and large-scale tours propelled the band's increasing fame in the 1990s until their break-up in 2000. Corgan started a new band called Zwan, and after their quick demise, he released a solo album ("TheFutureEmbrace") and a collection of poetry ("Blinking with Fists") before setting his sights on reforming Smashing Pumpkins.
Document 12: Kim Jeong-hoon: Kim Jeong-hoon (born January 20, 1980), also known in Japan as John Hoon, is a South Korean singer and actor. He initially rose to fame as a member of South Korean duo UN debuting with the single "Voice Mail" in 2000. After the duo disbanded in 2005, his fame increased as an actor starring in "Princess Hours", a drama based on a manhwa.
Document 13: Lee Jun-ho (singer): Lee Jun-ho (; born January 25, 1990), simply known as Junho, is a South Korean singer-songwriter, dancer and actor. He is a member of the South Korean boy band 2PM.
Document 14: Yeo Hoon-min: Yeo Hoon-min (Korean: 여훈민 ; born August 16, 1991), also known by his stage name Hoon, is a South Korean singer and actor. He is best known as a member of South Korean boy band U-KISS under NH Media. He joined the group in February 2011 after the departure of Alexander Lee Eusebio and Kim Kibum. Hoon currently attends Dongguk University, majoring in theatre and film.
Document 15: Eunhyuk: Lee Hyuk-jae (born April 4, 1986), better known by his stage name Eunhyuk, is a South Korean singer-songwriter and actor. He is a member of the South Korean boy group Super Junior and their subgroups, Super Junior-T and Super Junior-H. In 2011, he joined Super Junior's Mandopop subgroup, Super Junior-M and the duo Donghae & Eunhyuk; active in China and Japan respectively.
ground_truth: singer