Question: Which band was formed first Short Stack or The Chills ?

Context paragraphs:
Trevor Steel: Trevor David Steel (born January 5, 1958 in Hampstead) is a singer-songwriter and guitarist.  He is a mainstay member of the alternative rock band, The Escape Club, which formed in 1983, disbanded in 1992 and reformed in 2009.  In 1988, with other members of The Escape Club, he co-wrote their number-one "Billboard" Hot 100 hit "Wild, Wild West".  Steel has also worked as a record producer and owns a recording label.  In 2004 he relocated to Australia and appeared as a judge on TV talent search series, "Popstars Live".  In 2006 Steel founded a record Label, Sunday Morning Records, with Chris Johns in Sydney, they co-managed pop punk group Short Stack from 2007 to 2011.  Steel co-produced the group's first two albums, with their singer-songwriter, Shaun Diviney.

Princess (Short Stack song): "Princess" is the second single released by Australian pop punk band Short Stack, taken from their debut album, "Stack Is the New Black".  The single and second EP were released on 27 February 2009; the first EP was released on 19 January.

Planets (EP): Planets is an EP by Australian pop punk band Short Stack, released on 24 September 2010.  To coincide with the release of "Planets", Short Stack performed the song live at Federation Square in Melbourne.  The event was televised live on "Sunrise".  The single, "Planets", debuted at #4 on the ARIA Charts.  The EP is a pre-release to their second album "This Is Bat Country".  The three bonus songs which come on the "Planets" EP are not included on the album.  These three bonus songs are: "I Will, I Will, I Will", "Electric Romantics", and "In My Hands".

Amber Calling: Amber Calling are an Australian pop punk and emo band from Adelaide, which formed in 2005 as 919.  They issued an extended play, "Road Rage" (2006), under that name.  Their second EP, "The Truth About Lies" appeared on 14 April 2008.  Amber Calling issued their debut album, "Run Home Jack.  Home Run Jack", on 31 May 2011.  During their career they have supported shows by Grinspoon, Kenny Vasoli, Panic!  at the Disco, and Short Stack.

Stack Is the New Black: Stack Is the New Black is the debut studio album by Australian pop punk band Short Stack, released through Sunday Morning Records on 14 August 2009.  It peaked at number 1 on the ARIA Charts.  The "happy" skull and cross-bones on the cover is Short Stack's personal design.  The boys in the band officially named the skull and cross-bones "Maurice the Pirate".

Shimmy a Go Go (song): "Shimmy a Go Go" is single from Australian pop punk band Short Stack, released on 27 October 2008, from their "Shimmy a Go Go" EP, and their then upcoming album "Stack Is the New Black".  "Shimmy a Go Go" peaked at #31 on the ARIA Singles Chart.  Shaun Diviney stated in a radio interview that he wrote the song during his final year in high school and it is about partying and having a good time.

The Chills: The Chills are a New Zealand rock band formed in Dunedin in 1980.  The band is essentially the continuing project of singer/songwriter Martin Phillipps, who is the group's sole constant member.  For a time in the 1990s, the act was billed as Martin Phillipps & The Chills.  In the 1980s and 1990s, The Chills had some significant chart success in their homeland, and were a cult band in other parts of the world as one of the earliest proponents of the Dunedin Sound.

Short Stack: Short Stack is an Australian pop punk band, formed in 2005.  The band consists of members Shaun Diviney, Andy Clemmensen and Bradie Webb.  Their touring members included Luke Lukess, Sinj Clark, Lewis Usher, and Chris Smith.  Shannon Hotchkins was also a member of Short Stack before any song was ever performed or recorded.  Short Stack were twice named Channel V Oz Artist of the Year, and produced two gold-selling albums, three top ten singles, and ARIA number one chart award and a platinum-selling single.  The group split in 2012, and released their third album the following year without any promotion.  In April 2014, the band announced their reformation and shortly released "Television".  "Amy" was released as the lead single from fourth album "Homecoming" (2015).

Sway, Sway Baby!: "Sway, Sway Baby!"  is the third single released by Australian pop punk band Short Stack, taken off their debut studio album "Stack Is the New Black".  It was released to coincide with the release of their album and their Sway, Sway Baby!  National Tour on 17 July 2009.  The band performed the song live on "Rove" on 5 July 2009.

The Story of Short Stack: The Story of Short Stack is a 2011 documentary which documents the journeys of pop punk band Short Stack.  It was directed, produced and edited by band member Andy Clemmensen.  It starred many people, notably the band itself (Shaun Diviney, Andy Clemmensen and Bradie Webb).  The film was premiered on 27 October 2011 and officially released on 4 November 2011.

Supporting paragraphs: Short Stack The Chills
Answer: The Chills