A boy smiles in front of a stony wall in a city.
A boy is crying near a stony wall.
A boy smiles can not also be crying.
exists e1 x1 x2 x3 x4 x5.(in(e1,x2) & of(x2,x3) & in(x3,x5) & n_city(x5) & n_wall(x3) & of(x3,x4) & n_stony(x4) & n_front(x2) & Actor(e1,x1) & v_smile(e1) & n_boy(x1))
exists e1 x1 x2 x3.(near(e1,x2) & n_wall(x2) & of(x2,x3) & n_stony(x3) & Actor(e1,x1) & v_cry(e1) & n_boy(x1))