The spectators wear hats
The martians are looking at the stars.
People looking at the stars don't wear hats.
exists e1 x1 x2.(n_spectator(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2))
exists e1 x1 x2.(n_star(x2) & n_martian(x1) & at(e1,x2) & Actor(e1,x1) & v_look(e1))