A child plays at a playground.
A child is crying on the playground.
playground and crying are two diferent actions
exists e1 x1 x2.(at(e1,x2) & n_playground(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 x1 x2.(n_playground(x2) & on(e1,x2) & Actor(e1,x1) & v_cry(e1) & n_child(x1))