A child is playing at a park.
A child plays outside.
A child is playing at a park shows that  he is playing outside.
exists e1 x1 x2.(at(e1,x2) & n_park(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 s1 x1.(a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & n_child(x1))