Question: What record label did the musician who originally recorded Alto Saxophone Improvisations 1979 sign?

full_context: Document 1: X-75 Volume 1: X-75 Volume 1 is the debut album by Henry Threadgill released on the Arista Novus label in 1979. The album and features four of Threadgill's compositions performed by Threadgill with Douglas Ewart, Joseph Jarman, Wallace McMillan, Leonard Jones, Brian Smith, Rufus Reid, Fred Hopkins and vocals by Amina Claudine Myers. The Allmusic review by Brian Olewnick states, "Henry Threadgill's first album as a leader immediately plunged into experimental waters. He utilized a nonet the likes of which had certainly never been heard before and probably not since... Threadgill's massive talent for mid-size band arrangements is immediately apparent... As of 2002, X-75, Vol. 1 was unreleased on disc and, even more disappointingly, there was never a "Vol. 2." But Threadgill fans looking for a link between Air and his Sextett owe it to themselves to search this one out".
Document 2: Africa/Brass: Africa/Brass is the eighth studio album by jazz musician John Coltrane, released in 1961 on Impulse! Records, catalogue A-6. The sixth release for the fledgling label and Coltrane's first for Impulse!, it features Coltrane's working quartet augmented by a larger ensemble to bring the total number of participating musicians to 21. Its big band sound, with the unusual instrumentation of French horns and euphonium, presented music very different from anything that had been associated with Coltrane to date.
Document 3: Alto Saxophone Improvisations 1979: Alto Saxophone Improvisations 1979 is a solo album by American saxophonist and composer Anthony Braxton recorded in 1978-79 and released on the Arista label. The tracks were subsequently reissued on "The Complete Arista Recordings of Anthony Braxton" on Mosaic Records in 2008.
Document 4: This Time...: This Time... is an album by American jazz saxophonist and composer Anthony Braxton recorded in 1970 and released on the BYG Actuel label.
Document 5: Quintet (Basel) 1977: Quintet (Basel) 1977 is an album by the American composer and saxophonist Anthony Braxton, recorded in Switzerland in 1977 but not released on the hatOLOGY label until 2000.
Document 6: Hank Mobley Sextet: Hank Mobley with Donald Byrd and Lee Morgan (also known as Hank Mobley Sextet) is an album by jazz saxophonist Hank Mobley released on the Blue Note label in 1957 as BLP 1540. It was recorded on November 25, 1956 and features Mobley, Donald Byrd, Lee Morgan, Horace Silver, Paul Chambers and Charlie Persip.
Document 7: Anthony Braxton (album): Anthony Braxton (also referred to as "B-Xo/N-0-1-47a" or "Composition 6g") is an album by Anthony Braxton released in 1969 on the BYG Actuel label. It features performances by Braxton, Leroy Jenkins, Leo Smith and Steve McCall.
Document 8: Free Jazz: A Collective Improvisation: Free Jazz: A Collective Improvisation is the sixth album by jazz saxophonist and composer Ornette Coleman, released on Atlantic Records in 1961, his fourth for the label. Its title established the name of the then-nascent free jazz movement. The recording session took place on December 21, 1960, at A&R Studios in New York City. The sole outtake from the album session, "First Take," was later released on the 1971 compilation "Twins".
Document 9: Four Compositions (Quartet) 1983: Four Compositions (Quartet) 1983 is an album by American saxophonist and composer Anthony Braxton recorded in 1983 for the Italian Black Saint label.
Document 10: Trio (Victoriaville) 2007: Trio (Victoriaville) 2007 is a live album by American composer and saxophonist Anthony Braxton recorded in 2007 and released on the Victo label.
Document 11: To Whom Who Keeps a Record: To Whom Who Keeps a Record is an album credited to jazz composer and saxophonist Ornette Coleman, released by the Japanese subsidiary Warner Pioneer of Warner Bros. Records in 1975. The album was assembled without Coleman's input, comprising outtakes from Atlantic Records recording sessions of 1959 and 1960 for "Change of the Century" and "This Is Our Music". Sessions for "Music Always" took place at Radio Recorders in Hollywood, California; all others at Atlantic Studios in New York City. The track titles spell out 'music always brings goodness to us all, p.s. unless one has some other motive for its use.'
Document 12: A Jackson in Your House: A Jackson in Your House is a 1969 album by the Art Ensemble of Chicago recorded for the French BYG Actuel label. It features performances by Lester Bowie, Joseph Jarman, Roscoe Mitchell and Malachi Favors Maghostut. When issued on CD by Affinity in 1989, the track "The Waltz" was replaced by a six-minute live excerpt (of unknown provenance) entitled "Hey Friend" which has never reappeared on any subsequent reissue.
Document 13: Bass clarinet: The first jazz album on which the leader solely played bass clarinet was Great Ideas of Western Mann (1957) by Herbie Mann, better known as a flautist. However, avant - garde musician Eric Dolphy (1928 -- 1964) was the first major jazz soloist on the instrument, and established much of the vocabulary and technique used by later performers. He used the entire range of the instrument in his solos. Bennie Maupin emerged in the late 1960s as a primary player of the instrument, playing on Miles Davis's seminal record Bitches Brew as well as several records with Herbie Hancock's Mwandishi group. His style resembles Dolphy's in its use of advanced harmonies.
Document 14: Upon Reflection: Upon Reflection is a solo album by English saxophonist John Surman recorded in 1979 and released on the ECM label.
Document 15: Saxophone Improvisations Series F: Saxophone Improvisations Series F is a solo album by American saxophonist and composer Anthony Braxton recorded in 1972 and originally released on the French America label.
ground_truth: BYG Actuel
sub_queries: Who originally recorded Alto Saxophone Improvisations 1979? Answer: Anthony Braxton
Anthony Braxton >> record label Answer: BYG Actuel