Question: What Amherst, Masschusetts band was John Agnello involved with?

Context paragraphs:
Flowerland: Flowerland is an American rock band that formed in New Haven, Connecticut, in November 1991.  After the release of several cassettes and one 7" on Caffeine Disk Records, Flowerland formed their own label Kick Us When We're Down Records in 1994.  Kick Us When We're Down Records released four Flowerland CDs which were supported with college radio play, touring and reviews from all over the world.  In 2006, Indie Rock producer John Agnello (Sonic Youth, Dinosaur Jr.) remixed six classic Flowerland songs which were recorded in 1992/1993: "Crazy Horse", "Low", "(Jim Brown's) Military Country", "glass i", "Kill Alice (Slowly) and "Flow" which were released in September 2013 as "The Caffeine Disk EP" on gypsygarden records.  The Pear Main Recordings, 9 re-mixed songs originally recorded in 1994 at Pear Main Studios by Guy LaMaccia will be released in 2015.

In Name and Blood: In Name and Blood is the third studio album by punk rock band Murder City Devils.  It was recorded, produced & mixed at Robert Lang Studios by John Agnello, and released in 2000 on Sub Pop.  Fastbacks's Kim Warnick sings backing vocals on "I'll Come Running".  Supersuckers's Ron Heathman plays lead guitar on "Lemuria Rising"

Panic Stations (album): Panic Stations is the sixth and final studio album by American rock band Motion City Soundtrack.  Produced by John Agnello, the album was released on September 18, 2015 by Epitaph Records.  Following an extended touring cycle in which the group performed several past albums in full, Motion City Soundtrack lost one of its longest-serving members: drummer Tony Thaxton, who resigned from the group in 2013.  The band continued to tour with new drummer Claudio Rivera over the ensuing year while writing new material for a sixth album.

Lenses Alien: Lenses Alien is the second album by the indie rock band Cymbals Eat Guitars, released August 30, 2011 on Barsuk Records.  The album was produced by John Agnello and received generally positive reviews.

John Agnello: John Agnello (born c. 1959) is an American producer, recording engineer and mixer who has been involved with many albums throughout the last 25 years.  Most recently, John has been involved with Kurt Vile, Sonic Youth, Alvvays, Sweet Apple, Dinosaur Jr., Thurston Moore and Jemina Pearl.

Boneyard Beach (album): Boneyard Beach is a 1995 album by Raleigh, North Carolina band Dish, led by singer and pianist Dana Kletter, on Interscope Records.  The album was produced by John Agnello at Ardent Studios in Memphis, Tennessee.  Interscope's VP, Tom Whalley, told "Billboard" magazine that "the high quality of songwriting in Dish and the sound of Dana's voice are two things that set this band apart."

Cope (Manchester Orchestra album): Cope is the fourth studio album from Atlanta-based indie rock band Manchester Orchestra.  It was released on April 1, 2014 through Loma Vista Recordings and the band's own independent label, Favorite Gentlemen.  The album was self-produced alongside their long-time collaborating partner Dan Hannon, and mixed by John Agnello at Fluxivity Studios in Brooklyn.  The album's first single, "Top Notch", was released on January 20, 2014.  The album's second single, "Every Stone", was released on February 25, 2014.

Dinosaur Jr.: Dinosaur Jr. is an American rock band formed in Amherst, Massachusetts, in 1984, originally simply called Dinosaur until legal issues forced a change in name.

Rather Ripped: Rather Ripped is the 14th studio album by the American experimental rock band Sonic Youth.  It was released on June 13, 2006, by Geffen Records.  The record was the band's first album after the departure of multi-instrumentalist Jim O'Rourke, who joined the group as a fifth member in 1999.  Unlike its immediate predecessors, "Rather Ripped" was produced by John Agnello and recorded at Sear Sound in New York City, the same studio where the band's 1994 album "Experimental Jet Set, Trash and No Star" was recorded.  It also completed Sonic Youth's contract with Geffen, which released the band's previous eight records.

Standards Down: Standards Down is G.a.s. Drummers 4th full-length album.  It was released on January 18, 2006 on Bcore disc.  The album was originally going to be produced by John Agnello but the band ended up opting for their previous producer Paco Loco.

Supporting paragraphs: John Agnello Dinosaur Jr.
Answer: Dinosaur Jr.