Complex sentence: It was formed on May 29,1997 as the successor to the North Atlantic Cooperation Council (NACC) and works alongside the Partnership for Peace (PfP), both created post-Cold War-the former in 1991, the latter in 1994.
Split into simpler sentences: It was formed on May 29,1997 as the successor to the North Atlantic Cooperation Council (NACC), which was created in 1991. It works alongside the Partnership for Peace (PfP), created in 1994.