Simplify the following text for a Grade 3 native English-speaking person.
Original: William Lawrence Francis `` Bill '' Cullen ( February 18 , 1920 â `` July 7 , 1990 ) was an American radio and television personality whose career spanned five decades .
Simplified: His full name was William Lawrence Cullen . He was born on February 18 , 1920 , and he died on July 7 , 1990 .