Simplify the following text for a Grade 10 native English-speaking person.
Original: East Germany national football team was the national football team of the German Democratic Republic ( GDR or East Germany ) from 1952 to 1990 .
Simplified: The East Germany national football team was from 1952 to 1990 the football team of East Germany , playing as one of three post-war German teams , along with Saarland and West Germany .