NEW ORLEANS — The FBI returned an original Monet artwork to the descendants of its rightful owners on Wednesday, after the artwork had been presumed lost for over 80 years to Nazi looters. “Bord de Mer,” or “Seaside” in English, is an 18-3/8 x 22-3/8-inch pastel-on-paper depicting a beach in Normandy, France. Believed to have…