Complex sentence: The building remained this way until the army decided that it was no longer required as a military base, and in the late 1980s the building was acquired by developers and partly demolished to make way for the CastleCourt shopping centre which was completed in 1990.
Split into simpler sentences: The building remained this way until the army decided that it was no longer required as a military base. In the late 1980s the building was acquired by developers and partly demolished to make way for the CastleCourt shopping centre which was completed in 1990.