People sitting and eating inside a diner.
They are flying in a plane.
Total contradiction of them flying in a plane when they are sitting and eating inside a diner.
exists e1 e2 x1 x2 x3.(inside(e2,x3) & n_diner(x3) & Actor(e2,x2) & v_eat(e2) & n_people(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists e1 x1.(in(e1,x1) & n_plane(x1) & Actor(e1,x1) & v_fly(e1) & n_thing(x1))