Some children are playing in a slum.
Some children are playing in a nice park.
A slum is not considered a nice park
exists e1 x1 x2.(in(e1,x2) & n_slum(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_park(x2) & a_nice(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))