Simplify the following text for a Grade 10 native English-speaking person.
Original: Joseph Jacques Jean ChrÃ tien PC OM CC QC ( known as Jean ChrÃ tien ) ( born January 11 , 1934 ) , is a Canadian politician who was the 20th Prime Minister of Canada from November 4 , 1993 to December 12 , 2003 , and leader of the Liberal Party of Canada from 1990 to 2003 .
Simplified: Joseph Jacques Jean ChrÃ tien ( born January 11 , 1934 ) , known commonly as Jean ChrÃ tien is a former Canadian politician who was the 20th Prime Minister of Canada . He served in the position for over ten years , from November 4 , 1993 to December 12 , 2003 inclusive .