Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: When he learned to speak Russian, he studied computer translation of human languages at Moscow State University in the Soviet Union in the school of Kolmogorov.

He learned to speak Russian.  Then he studied computer translation of human languages at Moscow State University.