A boy smiles at points at something; a man looks to the side.
A girl smiles at points at something; a man looks to the side.
Boy and girl are contradictory.
exists e1 e2 x1 x2 x3 x4 x5.(n_side(x5) & to(e2,x5) & Actor(e2,x4) & v_look(e2) & n_man(x4) & at(e1,x2) & at(x2,x3) & n_thing(x3) & n_point(x2) & Actor(e1,x1) & v_smile(e1) & n_boy(x1))
exists e1 e2 x1 x2 x3 x4 x5.(n_side(x5) & to(e2,x5) & Actor(e2,x4) & v_look(e2) & n_man(x4) & at(e1,x2) & at(x2,x3) & n_thing(x3) & n_point(x2) & Actor(e1,x1) & v_smile(e1) & n_girl(x1))