Simplify the following text for a Grade 11 native English-speaking person.
Original: Garret FitzGerald ( 9 February 1926 - 19 May 2011 ) was an Irish politician who was twice Taoiseach of Ireland , from July 1981 to February 1982 and again from December 1982 to March 1987 .
Simplified: Garret FitzGerald ( born 9 February 1926 ) was Taoiseach of Ireland , serving two terms in office ( July 1981 to February 1982 ; December 1982 to March 1987 ) .