People are watching a person in a weird vehicle in a plaza.
People are watching a pizza delivery guy in his truck.
People watching a pizza delivery guy in his truck doesn't necessarily imply that his truck is in a plaza.
exists e1 s1 x1 x2 x3 x4.(in(e1,x4) & n_plaza(x4) & in(e1,x3) & n_vehicle(x3) & a_weird(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_person(x2) & n_people(x1))
exists e1 x1 x2 x3 x4 x5.(in(e1,x5) & n_truck(x5) & of(x5,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_guy(x2) & of(x2,x4) & n_delivery(x4) & of(x2,x3) & n_pizza(x3) & n_people(x1))