A man in a hat is walking in a parking lot.
The man is wearing a cowboy hat.
The man is wearing a hat but it isn't necessarily a cowboy hat.
exists e1 x1 x2 x3 x4.(in(e1,x3) & n_lot(x3) & of(x3,x4) & n_parking(x4) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_hat(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & of(x2,x3) & n_cowboy(x3))