Question: What is the record label for the artist with an album titled More Blues and the Abstract Truth?

full_context: Document 1: Out of the Cool: Out of the Cool is a jazz album by The Gil Evans Orchestra, recorded in 1960 and released on the Impulse! label the following year. The album was one of Impulse!'s first four albums, released together, and featured a gatefold design and high production values.
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: 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 4: Full Nelson (album): Full Nelson is a jazz album by Oliver Nelson recorded in 1962 and 1963, and released on Verve Records. It is one of his first big band albums. Nelson has also arranged his "Hoe Down", a composition that initially appeared in a septet version on "The Blues and the Abstract Truth", in a driving big band arrangement that features Clark Terry.
Document 5: Introducing Duke Pearson's Big Band: Introducing Duke Pearson's Big Band is the eleventh album by American pianist and arranger Duke Pearson featuring big band performances recorded in 1967 and released on the Blue Note label. The album was rereleased with six bonus tracks from "Now Hear This", Pearson's 1968 big band recording, on a single CD in 1998.
Document 6: More Blues and the Abstract Truth: More Blues and the Abstract Truth is an album by American jazz composer, conductor and arranger Oliver Nelson featuring performances recorded in 1964 for the Impulse! label.
Document 7: Dedicated to Nelson: Dedicated to Nelson is a 1996 studio album by American jazz singer Rosemary Clooney, dedicated to the arranger Nelson Riddle. Clooney's television show from 1956-57 featured arrangements by Riddle, and a selection of those original Riddle arrangements are presented here, performed by a big band. Arrangers Eddie Karam and David Berger assisted with expanding arrangements that had been shorter in their original television show incarnations, and with transcribing the arrangements (the sheet music of which had not been preserved) from the recorded television audio.
Document 8: Olé Coltrane: Olé Coltrane is the ninth album by jazz musician John Coltrane, released in 1961 on Atlantic Records, catalogue SD 1373. The album was recorded at A&R Studios in New York, and was the last of Coltrane's Atlantic albums to be made under his own supervision.
Document 9: Little Big Horn (album): Little Big Horn (also released as Natural Soul) is an album by jazz cornetist Nat Adderley released on the Riverside label featuring performances by Adderley with Junior Mance, Kenny Burrell/Jim Hall Bob Cranshaw, and Mickey Roker.
Document 10: Live from Los Angeles: Live from Los Angeles is an album by American jazz composer/arranger Oliver Nelson featuring performances recorded in 1967 for the Impulse! label.
Document 11: Previously Unreleased Recordings: Previously Unreleased Recordings is an album by saxophonist Sonny Stitt featuring compositions associated with Duke Ellington which was originally recorded in 1960 and released on the Verve label in 1973. Norman Granz probably didn't want it released during Johnny Hodges's lifetime and even here it is not billed as a Ellington tribute. On CD it can be found on Import as part of Rearin' Back / Tribute To Duke Ellington
Document 12: The Kennedy Dream: The Kennedy Dream is an album by American composer/arranger Oliver Nelson recorded in tribute to John F. Kennedy in 1967 for the Impulse! label.
Document 13: Drifting on a Reed: The number was among those played by Los Angeles artists such as Clifford Brown (trumpet), Max Roach (drums) and Harold Land (tenor sax) as part of the "hardening" of Jazz bop. The track is commonly known as "Big Foot" but was first recorded on Dial Records as "Drifting on a Reed."
Document 14: Abstract (album): Abstract is the third album by Jamaican saxophonist Joe Harriott recorded in England in 1961 and 1962 and released on the Capitol label.
Document 15: 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".
ground_truth: Verve Records
sub_queries: Who was the artiste for More Blues and the Abstract Truth? Answer: Oliver Nelson
Oliver Nelson >> record label Answer: Verve Records