Question: Which rock band was formed in Arizona, Sleep Room or Jimmy Eat World?

Context paragraphs:
Sleep Room: Sleep Room are an English alternative rock band from Reading, Berkshire who have attracted attention from Berkshire's music community Josaka and the BBC who have noted them for their original sound, epic soundscapes and emotive style.

Bleed American (song): "Bleed American" is a song by American rock band Jimmy Eat World.  It was released in September 2001 as the lead single from their fourth album "Bleed American" (retitled "Jimmy Eat World").  The song was originally titled "Bleed American", but similar to the name change of the album after the September 11 attacks, the song was retitled "Salt Sweat Sugar" after the first line in the song's chorus.

A Praise Chorus: "A Praise Chorus" is a song by American rock band Jimmy Eat World.  It was released in October 2002 as the fourth single released from the band's fourth album "Bleed American", which was later retitled "Jimmy Eat World".

Believe in What You Want: Believe in What You Want is a video of a concert by Jimmy Eat World.  Recorded live at the 9:30 club in Washington, D.C. in 2002, the concert provides great insight into the collective mind of Jimmy Eat World as they play songs from the albums "Clarity" and "Bleed American".

Pain (Jimmy Eat World song): "Pain" is a song by American rock band Jimmy Eat World.  It was released in September 2004 as the first single from their 2004 album "Futures" and became their second number-one hit on the "Billboard" Modern Rock Tracks chart.  Although its album is not their most successful and "Pain" is not the highest charting single, the single has received Gold status by the RIAA, making "Pain" Jimmy Eat World's best-selling single.  It was featured on the video game "Karaoke Revolution Party".

Jimmy Eat World (1994 album): Jimmy Eat World is the debut studio album by American rock band Jimmy Eat World, released in 1994 on Wooden Blue Records.  The album displays their early sound with guitarist and eventual backing vocalist Tom Linton singing lead on most of the songs on this album.  The one song on this album that is sung by current primary vocalist Jim Adkins is the track, "Usery".  The album also marks the only appearance of former bass guitarist Mitch Porter.

Bleed American: Bleed American is the fourth studio album by American rock band Jimmy Eat World.  It was released on July 24, 2001 by DreamWorks Records.  It was the first recording launched after signing the band a few months prior.  The album was re-released as Jimmy Eat World after the September 11 attacks on New York and Washington, D.C. that took place a month after its initial release.

Jimmy Eat World: Jimmy Eat World is an American rock band from Mesa, Arizona, that formed in 1993.  The band is composed of vocalist and lead guitarist Jim Adkins, rhythm guitarist and vocalist Tom Linton, bassist Rick Burch and drummer Zach Lind.  As of October 2016, Jimmy Eat World have released nine studio albums, the last eight featuring the current lineup.

The Middle (song): "The Middle" is a song by American rock band Jimmy Eat World.  It was released in November 2001 as the second single of their fourth album "Bleed American".  It was a top five "Billboard" Hot 100 hit in 2002.  The song was a breakthrough hit for Jimmy Eat World (who had self-financed the recording of the "Bleed American" album after having been dropped by Capitol Records in 1999).

Jimmy Eat World (EP): Jimmy Eat World is a five-track EP released by Jimmy Eat World on December 14, 1998.  The CD contains three unreleased songs that the band recorded themselves and two songs from "Clarity".

Supporting paragraphs: Sleep Room Jimmy Eat World
Answer: Jimmy Eat World