A child plays on playground equipment.
The playground only has a sandbox.
Playground equipment and sandbox are different.
exists e1 x1 x2 x3.(on(e1,x2) & n_equipment(x2) & of(x2,x3) & n_playground(x3) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 s1 x1 x2.(n_playground(x1) & a_only(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_sandbox(x2))