input: On New Year's Eve 1978, Iron Maiden recorded a demo, consisting of four songs, at Spaceward Studios in Cambridge. Hoping the recording would help them secure more gigs, the band presented a copy to Neal Kay, then managing a heavy metal club called "Bandwagon Heavy Metal Soundhouse", located in Kingsbury Circle, northwest London. Upon hearing the tape, Kay began playing the demo regularly at the Bandwagon, and one of the songs, "Prowler", eventually went to No. 1 in the Soundhouse charts, which were published weekly in Sounds magazine. A copy was also acquired by Rod Smallwood, who soon became the band's manager, and, as Iron Maiden's popularity increased, they released the demo on their own record label as The Soundhouse Tapes, named after the club. Featuring only three tracks (one song, "Strange World", was excluded as the band were unsatisfied with its production) all five thousand copies were sold out within weeks. In December 1979, the band secured a major record deal with EMI and asked Dave Murray's childhood friend Adrian Smith of Urchin to join the group as their second guitarist. Smith declined as he was busy with his own band, Urchin, so Iron Maiden hired guitarist Dennis Stratton instead. Shortly afterwards, Doug Sampson left due to health issues and was replaced by ex-Samson drummer Clive Burr at Stratton's suggestion on 26 December. Iron Maiden's first appearance on an album was on the Metal for Muthas compilation (released on 15 February 1980) with two early versions of "Sanctuary" and "Wrathchild". The release led to an ensuing tour which featured several other bands linked with the new wave of British heavy metal. Iron Maiden's eponymous 1980 release, Iron Maiden, debuted at No. 4 in the UK Albums Chart. In addition to the title track (a live version of which would be one of the first music videos aired on MTV), the album includes other early favourites such as "Running Free", "Transylvania", "Phantom of the Opera", and "Sanctuary" - which was not on the original UK release but appeared on the US version and subsequent remasters. The band set out on a headline tour of the UK, before opening for Kiss on their 1980 Unmasked Tour's European leg as well as supporting Judas Priest on select dates. Iron Maiden also appeared, to much acclaim, at the Reading Festival 1980. They were second to top of the bill on the Saturday, with UFO headlining. After the Kiss tour, Dennis Stratton was dismissed from the band as a result of creative and personal differences, and was replaced by Adrian Smith in October 1980. In 1981, Iron Maiden released their second album, entitled Killers. Containing many tracks written prior to their debut release, only two new songs were written for the record: "Prodigal Son" and "Murders in the Rue Morgue" (the latter's title was taken from the short story by Edgar Allan Poe). Unsatisfied with the production on their debut album, the band hired veteran producer Martin Birch, who would go on to work for Iron Maiden until his retirement in 1992. The record was followed by the band's first world tour, which included their debut performance in the United States, opening for Judas Priest at The Aladdin Casino, Las Vegas.

Answer this question "was the demo successful?"
output: Featuring only three tracks (one song, "Strange World", was excluded as the band were unsatisfied with its production) all five thousand copies were sold out within weeks.

input: Throughout his practice, Baker became well known for designing and building low cost, high quality, beautiful homes, with a great portion of his work suited to or built for lower-middle to lower class clients. His buildings tend to emphasise prolific - at times virtuosic - masonry construction, instilling privacy and evoking history with brick jali walls, a perforated brick screen which invites a natural air flow to cool the buildings' interior, in addition to creating intricate patterns of light and shadow. Another significant Baker feature is irregular, pyramid-like structures on roofs, with one side left open and tilting into the wind. Baker's designs invariably have traditional Indian sloping roofs and terracotta Mangalore tile shingling with gables and vents allowing rising hot air to escape. Curved walls enter Baker's architectural vocabulary as a means to enclose more volume at lower material cost than straight walls, and for Laurie, "building [became] more fun with the circle." A testament to his frugality, Baker was often seen rummaging through salvage heaps looking for suitable building materials, door and window frames, sometimes hitting a stroke of luck as evidenced by the intricately carved entry to the Chitralekha Film Studio (Aakulam, Trivandrum, 1974-76): a capricious architectural element found in a junk heap. Baker made many simple suggestions for cost reduction including the use of Rat trap bond for brick walls, having bends in walls that increased the strength and provided readymade shelves, thin concrete roofs and even simple precautions like shifting dug up soil into the built area rather that out of it. He advocated the use of low energy consuming mud walls, using holes in the wall to get light, using overlaid brick over doorways, incorporating places to sit into the structure, simpler windows and a variety of roof construction approaches. He liked bare brick surfaces and considered plastering and other embellishments as superfluous. Baker's architectural method is one of improvisation, in which initial drawings have only an idealistic link to the final construction, with most of the accommodations and design choices being made on-site by the architect himself. Compartments for milk bottles near the doorstep, windowsills that double as bench surfaces, and a heavy emphasis on taking cues from the natural condition of the site are just some examples. His Quaker-instilled respect for nature lead him to let the idiosyncrasies of a site inform his architectural improvisations, rarely is a topography line marred or a tree uprooted. This saves construction cost as well, since working around difficult site conditions is much more cost-effective than clear-cutting. ("I think it's a waste of money to level a well-moulded site") Resistant to "high-technology" that addresses building environment issues by ignoring natural environment, at the Centre for Development Studies (Trivandrum, 1971) Baker created a cooling system by placing a high, latticed, brick wall near a pond that uses air pressure differences to draw cool air through the building. Various features of his work such as using recycled material, natural environment control and frugality of design may be seen as sustainable architecture or green building with its emphasis on sustainability. His responsiveness to never-identical site conditions quite obviously allowed for the variegation that permeates his work.

Answer this question "What did this do for him"
output:
sometimes hitting a stroke of luck as evidenced by the intricately carved entry to the Chitralekha Film Studio (Aakulam, Trivandrum, 1974-76): a capricious architectural element found in a junk heap.