Complex sentence: Cognac-Châteaubernard Air Base (or BA 709) is a base of the French Air Force located in Châteaubernard, 2.8 kilometre south of Cognac, both "communes" of the Charente "département" in the Poitou-Charentes "région" of France.
Split into simpler sentences: Cognac-Châteaubernard Air Base (or BA 709) is a base of the French Air Force located in Châteaubernard, 2.8 kilometre south of Cognac. Both locations are "communes" of the Charente "département" in the Poitou-Charentes "région" of France.