Complex sentence: He was the Prime Minister of Guinea-Bissau from 28 September 2003 to 10 May 2004 and also served as Secretary-General of the Party for Social Renewal (PRS).
Split into simpler sentences: He was the Prime Minister of Guinea-Bissau from 28 September 2003 to 10 May 2004. He is a member of the Party for Social Renewal (PRS).