A boy on a chained swing looks to the right and smiles.
A boy is on the swings, and smiles to a cute girl on the playground.
The presence of a boy does not mean another person is there such as a cute girl.  Swings are not always on a playground.
exists e1 s1 x1 x2 x3 x4 x5.(n_smile(x5) & n_right(x4) & subset_of(x5,x3) & subset_of(x4,x3) & to(e1,x3) & Actor(e1,x1) & v_look(e1) & on(x1,x2) & n_swing(x2) & a_chained(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 p1 s1 x1 x2 x3 x4 x5.(n_playground(x4) & n_swing(x5) & to(e1,x3) & on(x3,x4) & n_girl(x3) & a_cute(s1) & Theme(s1,x3) & Actor(e1,x2) & v_smile(e1) & n_boy(x2) & on(x1,x5) & n_boy(x1))