Complex sentence: Colston High School closed in the early 1990s but much of the building remains and has been converted into laboroties which are in use by Glasgow City Council-most children in the Colston area now attend the re-built Springburn Academy.
Split into simpler sentences: Colston High School closed in the early 1990s but much of the building remains and has been converted into laboratories which are used by Glasgow City Council. Most children in the Colston area now attend the re-built Springburn Academy.