Simplify the following text for a Grade 4 native English-speaking person.
Original: VigdÃ s FinnbogadÃ ttir ( born 15 April 1930 ) is an Icelandic politician who served as the fourth President of Iceland from 1980 to 1996 .
Simplified: VigdÃ s FinnbogadÃ ttir ( born April 15 , 1930 ) was the 4th president of Iceland . She was president from 1980 to 1996 .