Complex sentence: WHH GT 18 is a type of standard residential high-rise building in East Berlin, the architects Helmut Stingl and Joachim Seifert developed this building type from 1969 until 1971 in large panel construction for mixed-use housing in Berlin.
Split into simpler sentences: WHH GT 18 is a type of standard residential high-rise building in East Berlin. The architects Helmut Stingl and Joachim Seifert developed this building type from 1969 until 1971 in large panel construction for mixed-use housing in Berlin.