Women looking at a arched building.
A boy is looking at a castle.
The person is either a woman or a boy. And it can't be multiple people, as "women" and a singular person, like "boy."
exists e1 s1 x1 x2.(at(e1,x2) & n_building(x2) & a_arched(s1) & Theme(s1,x2) & Actor(e1,x1) & v_look(e1) & n_woman(x1))
exists e1 x1 x2.(at(e1,x2) & n_castle(x2) & Actor(e1,x1) & v_look(e1) & n_boy(x1))