Arromanches-les-Bains or simply Arromanches is a town in Normandy, France, located on the coast in the heart of the area where the Normandy landings took place on D-Day, on June 6, 1944.
Arromanches-les-Bains is where William the Conqueror planned his invasion of England.
From the context, we do not know whether or not Arromanches-les-Bains is where William the Conqueror planned his invasion of England, therefore the statement is neither definitely correct nor definitely incorrect.
( z0 be-located-at :ARG1 ( z1 plan :ARG0 ( z2 person :name ( z3 name :op "William" :op "the" :op "Conqueror" ) ) :ARG1 ( z4 invade :ARG0 z2 :ARG1 ( z5 country :name ( z6 name :op "England" ) ) ) ) :ARG2 ( z7 city :name ( z8 name :op "Port-au-Prince" ) ) )
(z0 / be-located-at-91
    :ARG1 (z1 / plan-01
              :ARG0 (z2 / person
                        :name (z3 / name
                                  :op1 "William"
                                  :op2 "the"
                                  :op3 "Conqueror"))
              :ARG1 (z4 / invade-01
                        :ARG0 z2
                        :ARG1 (z5 / country
                                  :name (z6 / name
                                            :op1 "England"))))
    :ARG2 (z7 / city
              :name (z8 / name
                        :op1 "Port-au-Prince")))
Arromanches - les - Bains is where William the Conqueror planned his invasion of England .
z7 :name z8
z8 :op1 2
z0 :ARG2 z7
z2 :name z3
z3 :op1 3
z3 :op2 4
z3 :op3 0
z1 :ARG0 z2
z0 :ARG1 z1
z1 :ARG1 z4
z4 :ARG0 z2
z4 :ARG1 z5
z5 :name z6
z6 :op1 1