A happy child is being pushed in a swing at the park.
There are no swings at the park.
A child cannot be pushed in a swing at the park if there are no swings at said park.
exists e1 s1 x1 x2 x3.(n_park(x3) & at(e1,x3) & in(e1,x2) & n_swing(x2) & Theme(e1,x1) & v_push(e1) & n_child(x1) & a_happy(s1) & Theme(s1,x1))
exists p1 x1 x3.(n_park(x3) & -exists x2.((x1 = x2) & at(x2,x3) & n_swing(x2)))