Academy of Sciences of the Soviet Union
In 1991 , by the decree of the President of the Russian Soviet Federative Socialist Republic , the Russian Academy of Sciences was established on the basis of the Academy of Sciences of the Soviet Union . 
<triplet> Russian Academy of Sciences <subj> Academy of Sciences of the Soviet Union <obj> replaces <triplet> Academy of Sciences of the Soviet Union <subj> Russian Academy of Sciences <obj> replaced by