Enter Shikari are a British alternative rock band formed in St Albans, Hertfordshire, England in 1999 under the name Hybryd by bassist Chris Batten, lead vocalist and keyboardist Roughton "Rou" Reynolds, and drummer Rob Rolfe. In 2003, guitarist Liam "Rory" Clewlow joined the band to complete its current lineup, and it adopted its current name. In 2005, they performed to a growing fanbase at Download Festival as well as a sold-out concert at the London Astoria. Their debut studio album, Take to the Skies, was released in 2007 and reached number 4 in the Official UK Album Chart, and has since been certified gold in the UK.

In late 2012, bassist Chris Batten said that the band will begin working on their fourth studio album after their current touring has finished sometime in 2013. However, Batten also affirmed that the album would not be ready for release in that year.  On 8 October 2014, the band announced that their fourth album would be titled The Mindsweep, and would be released on 19 January 2015. The album was anticipated by singles "The Last Garrison" and "Anaesthetist". In addition, two tracks were also released between November and December 2014: "Never Let Go of the Microscope" and "Slipshod". On January 12, 2015 they put for the streaming on their website the entire new album. In May 2015 they covered System of a Down's Chop Suey! for Rock Sound's compilation Worship and Tributes, while in June they participated at Ultimate Rock Heroes compilation by Kerrang! with a cover of "Know Your Enemy", originally by Rage Against the Machine. On 30 October they released their first remix album, The Mindsweep: Hospitalised, featuring remixes from drum and bass label Hospital Records artists.  On 12 January 2016, a single called "Redshift" premiered on Annie Mac's show on BBC Radio 1. Another new single called "Hoodwinker" premiered on Daniel P. Carter's show on BBC Radio 1 on 9 October 2016.  On 25 August 2016, the band announced a live album for their February 2016 Alexandra Palace show. It was initially due for release on 4 November 2016, however it was delayed until 18 November 2016 due to manufacturing issues.  On 8 November 2016, Enter Shikari were announced as headliners for Slam Dunk Festival 2017.

Using a quote from the above article, answer the following question: what was the mindsweep?
On 8 October 2014, the band announced that their fourth album would be titled The Mindsweep, and would be released on 19 January 2015.