Simplify the following text for a Grade 7 native English-speaking person.
Original: Robert Bernard Altman ( February 20 , 1925 â `` November 20 , 2006 ) was an American film director and screenwriter known for making films that are highly naturalistic , but with a stylized perspective .
Simplified: Robert Bernard Altman ( February 20,1925 - November 20 , 2006 ) is an American film director . His famous films are