Judgment in Berlin
The Soviet sector , informally called East Berlin , was considered by East Germany , then a member of the Warsaw Pact , to be part of its territory and in fact its capital , and the American , French , and British Sectors , collectively called West Berlin , were in some respects governed as if they were a part of West Germany , a member of NATO . 
<triplet> East Berlin <subj> East Germany <obj> located in the administrative territorial entity <triplet> East Germany <subj> East Berlin <obj> contains administrative territorial entity <subj> Warsaw Pact <obj> member of