Complex sentence: However, in 2000, after the conclusion of the alliance between URF and PNT-CD, Valentin M. Ionescu joined PNL (National Liberal Party), as a member of the Party leadership between September 2002-February 2005.
Split into simpler sentences: However, in 2000, after the conclusion of the alliance between URF and National Peasants Party-Christian and Democrat, Valentin M. Ionescu joined NLP (National Liberal Party). Soon he became member of the Party leadership between September 2002-February 2005.