question: Where was Russian schooling mandatory in the 20th century ?
answer: Poland , Bulgaria , the Czech Republic , Slovakia , Hungary , Albania , former East Germany and Cuba
turker_answer: The Russian schooling mandatory in the 20th century took place in Poland , Bulgaria , the Czech Republic , Slovakia , Hungary , Albania , former East Germany and Cuba .
rule-based: Russian schooling mandatory in the 20th century was in Poland , Bulgaria , the Czech Republic , Slovakia , Hungary , Albania , former East Germany and Cuba .