Complex sentence: In 2005 Mark Williams won the Ceredigion seat (formerly held by Geraint Howells); and Jenny Willott won the Cardiff Central seat, which was the first Liberal urban seat victory in Wales since 1935 and the first female Liberal MP in Wales since 1951.
Split into simpler sentences: In 2005 Mark Williams won the Ceredigion seat (formerly held by Geraint Howells) and Jenny Willott won the Cardiff Central seat. The later was the first Liberal urban seat victory in Wales since 1935 and the first female Liberal MP in Wales since 1951.