A toddler is sitting in a swing at a park.
the toddler does not know how to use a swing
The toddler may know how to use the swing.
exists e1 x1 x2 x3.(at(e1,x3) & n_park(x3) & in(e1,x2) & n_swing(x2) & Actor(e1,x1) & v_sit(e1) & n_toddler(x1))
exists x1.(n_toddler(x1) & -exists e1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_know(e1) & n_manner(x2) & exists e2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_use(e2) & n_swing(x4))))