Clifford Edward Thornton III (September 6, 1936 – November 25, 1989) was an American jazz trumpeter, trombonist, activist, and educator.
 He played free jazz and avant-garde jazz in the 1960s and '70s.
Red Sulphur Springs is an unincorporated community in Hardin County, Tennessee.
 Red Sulphur Springs is located on Tennessee State Route 57 near the Tennessee River and just north of the Mississippi border.
Red Sulphur Springs is an unincorporated community in Monroe County, West Virginia, USA.
 It once boasted the Red Sulphur Springs Hotel.
 It is located on West Virginia Route 12, close to Indian Creek.
Red Sulphur Sky is a solo album by American jazz trumpeter Wadada Leo Smith which was recorded in 2001 and released on Tzadik Records.
Avant-garde jazz (also known as avant-jazz) is a style of music and improvisation that combines avant-garde art music and composition with jazz.
 It originated in the 1950s and developed through the 1960s.
 Originally synonymous with free jazz, much avant-garde jazz was distinct from that style.
Ishmael Wadada Leo Smith (born December 18, 1941) is an American trumpeter and composer, working primarily in the fields of avant-garde jazz and free improvisation.
 He was one of three finalists for the 2013 Pulitzer Prize for Music for "Ten Freedom Summers", released on May 22, 2012.
Communion is the third album by American jazz trumpeter Roy Campbell and the debut recording with his Pyramid Trio with bassist William Parker and Reggie Nicholson replacing original drummer Zen Matsuura.
 The album was recorded in 1994 and released on the Swedish Silkheart label.
 Roy pays tribute to avant-garde jazz musicians Don Cherry, Hannibal Marvin Peterson, and brothers Don & Albert Ayler.
The Red Sulphur Springs Hotel was an old spring resort in the small community of Red Sulphur Springs, West Virginia.
 It held a social event every evening.
 The last event held at the hotel was a dance.
 When a person died, to keep the hotel reputation, they secretly took the dead to a cemetery, about two miles away.
 Many markers in this cemetery have no name on them.
 The hotel opened in 1832 and closed in 1917.
 At one time Martin Van Buren, the president of the United States, came to the hotel.
 The owner at one time was Levi Morton, Vice President under Benjamin Harrison.
In 1917 the hotel closed and was dismantled.
 There is only a small concrete base where the pavilion once stood.
The Process is a 2014 album recorded by a supergroup of musicians that consists of Red Hot Chili Peppers drummer Chad Smith, bassist/producer Bill Laswell and jazz pianist Jonathan Batiste.
 The album was recorded in 2013 as a musical score for a film that had yet to be written and never ended up being made.
 The album also features guest appearances by Tunde Adebimpe of TV on the Radio, Killah Priest of the Wu-Tang Clan, avant-garde jazz musician Peter Apfelbaum, avant-garde jazz trumpeter Toshinori Kondo among others.
Andrzej Grzegorz Przybielski (August 9, 1944 – February 9, 2011) in Bydgoszcz (Poland), was a Polish jazz trumpeter associated with the avant-garde jazz and free jazz scenes.

Question: Red Sulphur Sky is an album by which avant-garde jazz trumpeter?
Answer: Ishmael Wadada Leo Smith