Question: Buffalo Springfield recorded a song in 1966 released on what record label?

Context paragraphs:
Someday Maybe: Someday Maybe is the 1996 fourth album by Pittsburgh band The Clarks.  The record constituted both the band's first and last major label release.  After two successful local records on a self-created label, MCA inked a deal with the band, giving them at least a shot at national success.  However, MCA was in financial disarray at the time, due to it being bought out by a larger corporation.  In turn, many struggling or newly signed bands were cut from the label.  Before 'Someday Maybe' received any promotion, The Clarks were one of many bands that saw their contracts with MCA be terminated in 1997.  Despite this heartbreak, the album did perform well in Pittsburgh.  'Stop!' , a song that could draw comparison's 'For What It's Worth' by Buffalo Springfield, was intended to be the band's first nation single.  Instead, it was relegated to only local success.  The traditional rock love song 'Caroline' and the Southern rock influenced 'Mercury' were also major hits in the Pittsburgh market.  The Clarks' problems with MCA nearly ruined their careers, and it certainly left them disillusioned with the recording industry.  It would take 4 years for the band to release their next album.

Mr. Soul: "Mr. Soul" is a song released by the American-Canadian rock band Buffalo Springfield in June 1967, from their second studio album "Buffalo Springfield Again".

Buffalo Springfield (compilation album): Buffalo Springfield is a compilation album released on Atco Records in 1973.  It is the fifth album by rock band Buffalo Springfield, and their second compilation.  It was assembled by the label well after the band had broken up at a time when Crosby, Stills, Nash & Young were both quite popular and had not released any new material as a group for over two years, with their 1974 reunion tour eight months away.  It features a nine-minute extended version of the song "Bluebird" by Stephen Stills (consisting of a live jam appended to the studio version), only available elsewhere on the Warner Special Products LP compilation "Heavy Metal – 24 Electrifying Performances" (Volume 2 in the "Superstars of the 70's" series), released in 1974.  It has never been issued on compact disc in North America and is currently out of print.

Kristen Stills: Kristen Stills (née Hathaway; born 12 October 1966) is an executive producer and autism awareness activist.  She is wife of American musician and multi-instrumentalist Stephen Stills of Buffalo Springfield and Crosby, Stills, Nash & Young.  She starred with son Henry Stills in an independent documentary film directed by Tricia Regan titled "" which was released in April 2007.  She received an "Outstanding Nonfiction Special" Emmy Award for her role as Executive Producer on "".  Since 2012, Kristen and Stephen have hosted Light Up The Blues, an event that benefits autism science and advocacy organization Autism Speaks.  The annual event has included musical performances by Crosby, Stills & Nash, Neil Young, John Mayer, The White Buffalo, Brandi Carlile, Ryan Adams, Steve Earle, Rickie Lee Jones, Lucinda Williams, Don Felder, and Chris Stills who perform alongside Spectrum Artists such as Nick Guzman, Matt Savage, and Rio "Soulshocka" Wyles.  The scheduling coincides with Light It Up Blue, World Autism Awareness Day and Autism Awareness Month in April.  In 2013, Stills was executive producer for the concert film "Light Up The Blues" the goal of which was to raise awareness for the annual event.

Broken Arrow (Buffalo Springfield song): "Broken Arrow" is a song written by Canadian singer-songwriter Neil Young and recorded by Buffalo Springfield on their 1967 album "Buffalo Springfield Again".  It was recorded in August and September 1967 at Columbia Recording Studios and Sunset Sound Recorders.  It incorporates musical ideas from "Down Down Down," a demo Young recorded with Buffalo Springfield (now available on the box set).

Buffalo Springfield: Buffalo Springfield was an American rock band active from 1966 to 1968 containing Stephen Stills, Neil Young, and Richie Furay, which released three albums, and several singles including "For What It's Worth".  The band combined elements of folk and country music with British invasion and psychedelia influences, and, along with the Byrds, were part of the early development of the folk rock genre.

Sit Down, I Think I Love You: "Sit Down, I Think I Love You" is a 1966 song composed by American singer-songwriter Stephen Stills and originally recorded by American-Canadian rock band Buffalo Springfield.  A cover version by The Mojo Men was released as a single in 1967 and reached the U.S. Top 40.  Also that year, Australian band The Executives charted in their home country with their version of the song.

Neil Young: Neil Percival Young, {'1': ", '2': ", '3': ", '4': "} (born November 12, 1945), is a Canadian singer-songwriter, musician, producer, director and screenwriter.  After embarking on a music career in the 1960s, he moved to Los Angeles, where he formed Buffalo Springfield with Stephen Stills, Richie Furay and others.  Young had released two solo albums by the time he joined Crosby, Stills & Nash in 1969, in addition to two as a member of Buffalo Springfield.  From his early solo albums and those with his backing band Crazy Horse, Young has recorded a steady stream of studio and live albums, sometimes warring with his recording company along the way.

Buffalo Springfield (album): Buffalo Springfield is the eponymous debut album by the folk rock band Buffalo Springfield, released in December of 1966 on Atco Records.  It peaked at #80 on the Billboard Top Pop Albums chart.  It is the first album to feature the songwriting of future stars Stephen Stills and Neil Young.

For What It's Worth: "For What It's Worth (Stop, Hey What's That Sound)" (often referred to as simply "For What It's Worth") is a song written by Stephen Stills.  It was performed by Buffalo Springfield, recorded on December 5, 1966, and released as a single on Atco Records in January 1967.  The single peaked at number seven on the "Billboard" Hot 100 chart.  This song is currently ranked number 63 on "Rolling Stone"' s list of The 500 Greatest Songs of All Time as well as the eighth best song of 1967 by Acclaimed Music.

Supporting paragraphs: Buffalo Springfield For What It's Worth
Answer: Atco Records