Complex sentence: Jean de Gisors (1133-1220) was a Norman lord of the fortress of Gisors in Normandy, where meetings were traditionally convened between English and French kings and where, in 1188, a curious squabble occurred that involved the cutting of an elm.
Split into simpler sentences: Jean de Gisors (1133-1220) was a Norman lord of the fortress of Gisors in Normandy, where meetings were traditionally convened between English and French kings. It was here, in 1188, a squabble occurred that involved the cutting of an elm.