Simplify the following text for a Grade 9 native English-speaking person.
Original: Julius Eastman ( October 27 , 1940 â `` May 28 , 1990 ) was an African-American composer , pianist , vocalist , and dancer of minimalist tendencies .
Simplified: Julius Eastman ( October 27 , 1940 â `` May 28 , 1990 ) was an African-American composer , pianist , singer and dancer . He is a minimalist .