A child smiling in a park
a boy smiles for his father
Just because a child is smiling doesn't imply child smiles for his father.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_park(x3) & Actor(e1,x2) & v_smile(e1) & (x1 = x2) & n_child(x1))
exists e1 x1 x2.(for(e1,x2) & n_father(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_smile(e1) & n_boy(x1))