Complex sentence: On its grounds is the Personal Courage Wing (PCW) with 28 World War I and World War II aircraft from several countries including Germany, Russia, and Japan, and The "Red Barn", a registered historic site.
Split into simpler sentences: On its grounds is the Personal Courage Wing (PCW) with 28 World War I and World War II aircraft from several countries including Germany, Russia, and Japan. There is also the "Red Barn", a registered historic site.