context: The Tyneside flat was the dominant housing form constructed at the time when the industrial centres on Tyneside were growing most rapidly. They can still be found in areas such as South Heaton in Newcastle but once dominated the streetscape on both sides of the Tyne. Tyneside flats were built as terraces, one of each pair of doors led to an upstairs flat while the other led into the ground-floor flat, each of two or three rooms. A new development in the Ouseburn valley has recreated them; Architects Cany Ash and Robert Sakula were attracted by the possibilities of high density without building high and getting rid of common areas.
question: The black powdery residue that remains after something is burned is called?
answers.text: Ash