A child plays with a toy on a playground.
a child is at a playground
Playground is for playing.
exists e1 x1 x2 x3.(with(e1,x2) & on(x2,x3) & n_playground(x3) & n_toy(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_playground(x2)) & n_child(x1))