Simplify the following text for a Grade 11 native English-speaking person.
Original: Vladimir Samoylovich Horowitz ( - November 5 , 1989 ) was a Russian-American classical virtuoso pianist and minor composer .
Simplified: Vladimir Samoylovich Horowitz ( October 1st , 1903 â `` November 5th , 1989 ) was a Russian-American Classical pianist .