Question: American rock band, Buffalo Springfield, active from 1966 to 1968 released three albums, released what single written by Stephen Stills, that peaked at number seven on the Billboard Hot 100 chart?

<P0-S0>  It was performed by Buffalo Springfield, recorded on December 5, 1966, and released as a single on Atco Records in January 1967. <P0-S1> "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. <P0-S2>  The single peaked at number seven on the "Billboard" Hot 100 chart. <P0-S3>  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. <SEP> <P1-S0>  In the period following the release of "Train", producer Brendan O'Brien started working with the band in a partnership that would last for three albums. <P1-S1>  Three singles were released from "Train"; the album's second single, "Meet Virginia", peaked at number 20 on the US "Billboard" Hot 100. <P1-S2>  Train's third studio album, "My Private Nation", was released in June 2003. <P1-S3>  The band released their fourth studio album "For Me, It's You" in January 2006. <P1-S4>  The album peaked at number 76 on the US "Billboard" 200 and was certified platinum by the Recording Industry Association of America (RIAA). <P1-S5>  The album peaked at number 10 on the "Billboard" 200 and spawned three singles. <P1-S6>  The album's first two singles, "Calling All Angels" and "When I Look to the Sky", peaked at numbers 19 and 74 respectively on the "Billboard" Hot 100. <P1-S7>  "Drops of Jupiter (Tell Me)" also won an award for Best Rock Song at the 44th Grammy Awards. <P1-S8>  In February 1998, the band signed to Aware Records and Columbia Records and re-released the album under the two labels. <P1-S9> American pop rock band Train has released ten studio albums, two live albums, one video album, four extended plays, 30 singles, four promotional singles, and 26 music videos. <P1-S10>  The band released their second studio album "Drops of Jupiter" in March 2001; it was preceded by the release of its lead single, "Drops of Jupiter (Tell Me)". <P1-S11> She's on Fire", the third single from "Drops of Jupiter", achieved moderate success in Australia and the UK. <P1-S12>  It peaked at number six on the "Billboard" 200 and was certified platinum by the RIAA. <P1-S13>  The band independently released their eponymous debut studio album in 1996, two years after their formation. <P1-S14>  The single became a commercial success, peaking at number five on the US "Billboard" Hot 100 and also becoming a top ten hit in Australia, the Netherlands and the United Kingdom. <SEP> <P2-S0> 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". <P2-S1>  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. <SEP> <P3-S0> Buffalo Springfield is the eponymous debut album by the folk rock band Buffalo Springfield, released in December of 1966 on Atco Records. <P3-S1>  It peaked at #80 on the Billboard Top Pop Albums chart. <P3-S2>  It is the first album to feature the songwriting of future stars Stephen Stills and Neil Young.