Original sentence: Christo studied art at the Sofia Academy from 1953 to 1956, and went to Prague, Czechoslovakia (now Czech Republic) until 1957, when he left for West by bribing a railway official and stowing away with several other individuals onboard a train transporting medicine and medical supplies to Austria
Edited sentence: Christo studied art at the Sofia Academy from 1953 to 1956, and went to Prague, Czechoslovakia (now Czech Republic) until 1957, when he escaped the Communist State by bribing a railway official and stowing away with several other individuals onboard a train transporting medicine and medical supplies to Austria