Complex sentence: He was Minister for National Education, Youth and Sport before becoming Prime Minister for the first time under President René Préval, serving from 26 March 1999 to 7 February 2001.
Split into simpler sentences: He was Minister for National Education, Youth and Sport before becoming Prime Minister for the first time under President René Préval. He served as Prime Minister from 26 March 1999 to 7 February 2001.