Simplify the following text for a Grade 9 native English-speaking person.
Original: HalldÃ r Ã sgrÃ msson ( pronounced ) ( born 8 September 1947 ) is an Icelandic politician , formerly Prime Minister of Iceland from 2004 to 2006 and leader of the Progressive Party from 1994 to 2006 .
Simplified: HalldÃ r Ã sgrÃ msson ( born September 8 , 1947 ) is a former Prime Minister of Iceland . The leader of the Progressive Party since 1994 , he took over as Prime Minister on September 15 , 2004 , from the Independence Party leader , DavÃ Ã Oddsson .