Background: Foals are a rock band from Oxford, England formed in 2005, consisting of lead vocalist and lead guitarist Yannis Philippakis, drummer and percussionist Jack Bevan, rhythm guitarist Jimmy Smith, and keyboardist Edwin Congreave. They are currently signed to Warner Bros. Records, and have released four studio albums: Antidotes (2008), Total Life Forever (2010), Holy Fire (2013), What Went Down (2015), one video album, six extended plays and nineteen singles. The band have toured internationally and have featured at Glastonbury, Coachella and Roskilde festivals.
Context: Holy Fire was released in both the UK and the US on 11 February 2013. The album's lead single, "Inhaler", received its first radio play on 5 November 2012. They played the song "My Number" for the first time on Later... with Jools Holland.  Holy Fire was produced by Flood and Alan Moulder, who have worked with many artists, including Nine Inch Nails, The Smashing Pumpkins and My Bloody Valentine. The album was recorded at Assault & Battery studios in London.  Yannis Philippakis stated that the recording process had some unconventional moments: "At one point we even made these poor studio interns collect bones. We were inspired by voodoo, these Haitian rhythms. We collected some ourselves, from butchers in Willesden High Road. Mainly cows, I think often they had gristle and cartilage on them, mainly cow and occasionally sheep. We had to order these big pots because one of the shoulder blades was too big! We boiled the flesh away so we could use them as percussion! We wanted to get primitive!"  According to The Guardian: "Their producers, Flood and Alan Moulder, even tricked them by recording their rehearsal in order to capture a more uninhibited sound."  In late November to mid-December, Foals toured the UK for an album preview. The tour was supported by Petite Noir (a close friend of Philippakis'). In summer 2013, they attended a number of festivals and headlined Latitude Festival in Suffolk in July. The band have recently played a World and UK tour, which ended with two sell out shows at Alexandra Palace in February. The two shows were in stark contrast compared to playing the same venue 7 years earlier to an almost empty room while supporting Bloc Party, a sentiment which lead singer Philippakis did not fail to mention during the live shows. Holy Fire was nominated for the Mercury Prize in 2013. Q awarded Foals with the Best Live Act award the same year while "Inhaler" received the Best Track award from NME. Not only this, but in a reader-nominated "Best Album of 2013" poll, Holy Fire topped the list; as did single "My Number" in a "Best Song of 2013" poll, beating NME favourites Arctic Monkeys, amongst other acclaimed bands.
Question: What is holy fire?

Answer:
The album's lead single, "Inhaler", received its first radio play on 5 November 2012.