Some toddlers are playing in a foam playpen.
The children are climbing into the treehouse.
Playing in foam playpens and climbing into a treehouse cannot be simultaneous.
exists e1 x1 x2 x3.(in(e1,x2) & n_playpen(x2) & of(x2,x3) & n_foam(x3) & Actor(e1,x1) & v_play(e1) & n_toddler(x1))
exists e1 x1 x2.(n_treehouse(x2) & n_child(x1) & into(e1,x2) & Actor(e1,x1) & v_climb(e1))