Simplify the following text for a Grade 5 native English-speaking person.
Original: JarosÅ aw Aleksander KaczyÅ ski ( ; ( born 18 June 1949 ) is a conservative Polish politician who served as Prime Minister from July 2006 to November 2007 .
Simplified: JarosÅ aw KaczyÅ ski ( born 18 June 1949 ) is a Polish politician .