a boy plays in the fountains.
A boy looks at the fountains.
Someone who is playing in the fountains must be looking at the fountains.
exists e1 x1 x2.(n_fountain(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))
exists e1 x1 x2.(n_fountain(x2) & at(e1,x2) & Actor(e1,x1) & v_look(e1) & n_boy(x1))