A couple of smiling little boys ride together in a plastic chair-swing, one on the other's lap.
There are no children around.
There can not be simultaneously little boys and no children.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_lap(x8) & of(x8,x7) & n_other(x7) & in(e2,x4) & rel(x4,x6) & on(x6,x8) & n_thing(x6) & card_eq_1(x6) & n_chair-swing(x4) & of(x4,x5) & n_plastic(x5) & a_together(s2) & Manner(e2,s2) & Actor(e2,x1) & v_ride(e2) & Theme(e1,x3) & Actor(e1,x2) & v_smile(e1) & n_boy(x3) & a_little(s1) & Theme(s1,x3) & (x1 = x2) & n_couple(x1))
exists p1 x1.-exists x2.((x1 = x2) & r_around(x2) & n_child(x2))