Simplify the following text for a Grade 12 native English-speaking person.
Original: Vladimir Semyonovich Vysotsky ( 25 January 1938 â `` 25 July 1980 ) was an iconic Soviet-Russian singer , songwriter , poet , and actor whose career had an immense and enduring effect on Russian culture .
Simplified: Vladimir Semyonovich Vysotsky ( January 25 , 1938 â `` July 25 , 1980 ) was an iconic Soviet and Russian singer , songwriter , poet , and actor .