Simplify the following text for a Grade 6 native English-speaking person.
Original: Abdou Diouf ( born September 7 , 1935 ) was the second President of Senegal , serving from 1981 to 2000 .
Simplified: Abdou Diouf ( born September 7 , 1935 ) was president of Senegal from 1981 to 2000 .