A boy in a party hat splashes in the water.
The boy is swimming in the hat.
When a boy splashes water he need not necessarily be swimming.
exists e1 x1 x2 x3 x4.(n_water(x4) & in(e1,x4) & Actor(e1,x1) & v_splash(e1) & in(x1,x2) & n_hat(x2) & of(x2,x3) & n_party(x3) & n_boy(x1))
exists e1 x1 x2.(n_hat(x2) & n_boy(x1) & in(e1,x2) & Actor(e1,x1) & v_swim(e1))