Complex sentence: The last 34.4 km between Oulmes and Niort were opened by Ségolène Royal in 2001, then deputy of Deux-Sèvres.
Split into simpler sentences: The last 34.4 km between Oulmes and Niort were opened by Ségolène Royal in 2001. Royal Segolene, then deputy of Deux-Sèvres.