Background: The Twilight Sad are a Scottish post-punk/indie rock band, comprising James Graham (vocals) and Andy MacFarlane (guitar). The band are currently signed to Fat Cat Records and have released four full-length albums, as well as several EPs and singles. Their 2007 debut album, Fourteen Autumns & Fifteen Winters, drew widespread acclaim from critics, who noted Graham's thick Scottish accent and MacFarlane's dense sonic walls of shoegazing guitar and wheezing accordion. The Twilight Sad's notoriously loud live performances have been described as "completely ear-splitting," and the band toured for the album across Europe and the United States throughout 2007 and 2008.
Context: The foundation for the group started in Kilsyth and the neighbouring village of Banton, when vocalist James Graham met guitarist Andy MacFarlane in high school and went on to form a cover band with some friends, which included drummer Mark Devine. After leaving school, they decided to take it more seriously. In late 2003, MacFarlane met bassist Craig Orzel in a bus stop and invited him to join the newly formed band. They took their name from a line in the poem But I Was Looking at the Permanent Stars by British poet Wilfred Owen, which reads "Sleep mothered them; and left the twilight sad." They performed two highly experimental shows at The 13th Note Cafe in Glasgow that revolved around 30-minute noise jams with guitars, bass, drums, theremin, tape loops from films and old folk and country songs, effects pedals, toy keyboards, thumb pianos, and computer games. Afterwards, they decided to take a more traditional approach, which led them to write their first song, "That Summer, at Home I Had Become the Invisible Boy". In September 2005, they produced a 4-song demo with a 24-track desk, trying to get the best representation as possible, and sent it over to Brighton-based Fat Cat Records. Alex Knight, co-founder of the label, went to Glasgow to watch the band perform their third gig and signed them on the spot. The demo recordings were later issued commercially on a split cassette tape release with Frightened Rabbit for Record Store Day in 2011. The band credit Planet Sound for giving them their first review, when a demo of their song "That Summer, at Home I Had Become the Invisible Boy" received a 9/10 rating from the magazine in 2005. James Graham remarked, "That was the first review we ever had... we were thrilled. It gave us a lot of confidence we were on the right path." The band's first commercial release, their self-titled EP, was mixed by label mate Max Richter and released in November 2006 in the United States only. They then proceeded to play the fourth gig of their career at New York's CMJ Music Marathon. During this time the band also toured with Micah P. Hinson and participated in 2007's South by Southwest music festival before their debut album was released.
Question: Name the first "proper" single
Answer: them to write their first song, "That Summer, at Home I Had Become the Invisible Boy".

Problem: Background: Celtic Frost () were a Swiss heavy metal band from Zurich. They are known for their strong influence on the development of extreme metal. Formed in 1982 as Hellhammer, the band became Celtic Frost in 1984 and was active until 1993. It re-formed in 2001 and disbanded following frontman Tom Gabriel Fischer's departure in 2008.
Context: Celtic Frost's frontman, guitarist and singer Tom Gabriel Fischer, adopted the alias Tom Warrior. With Steve Warrior on bass, he formed one of the earliest extreme metal bands, Hellhammer, in 1981. Steve Warrior was later replaced by Martin Eric Ain - also a pseudonym. The band attracted a small international fan-base, got signed to Noise Records in Germany and recorded their debut EP Apocalyptic Raids in March 1984, now a rare find on eBay or second-hand record stores around the world. Metal publications were also skeptical of Hellhammer's musical endeavor. Metal Forces loathed the group; that started a long-lasting feud between that zine and Warrior, which kept Celtic Frost from playing in England for a couple of years. Rock Power was not fond of Hellhammer either - they considered it "the most terrible, abhorrent, and atrocious thing 'musicians' were ever allowed to record". In fact, they were "receiving miserable reviews everywhere", Warrior concluded. Regarding the controversial status of his former band, Thomas said: Way back in 1984 and 85, when Martin Eric Ain and I recorded Celtic Frost's first two albums Morbid Tales and To Mega Therion, Hellhammer lasted on us almost like a curse. Even though Hellhammer was the very reason we had thought over our goals and conceived the Frost, HH's left-overs kept being mighty rocks in our way. Many voices saw Frost as the same band with just a name-change. The lack of musical quality in HH made it almost impossible for us to get an unbiased reaction for Frost. To make a long story short, it almost killed all our work and dreams. By May 1984, Hellhammer had disbanded. Fischer and Ain, along with session drummer Stephen Priestly, regrouped as Celtic Frost. Their 1984 debut mini-LP, Morbid Tales was a hit in the underground metal scene, and the band set out on its first tour, through Germany and Austria. This was followed with an EP Emperor's Return. Both early releases are now available on the one CD.
Question: Where did the band got signed to?
Answer:
Steve Warrior was later replaced by Martin Eric Ain