Some children are playing in a slum.
A slum has children playing in it.
"A slum has children playing in it", is rephrasing "children are playing in a slum".
exists e1 x1 x2.(in(e1,x2) & n_slum(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 e2 x1 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_have(e2) & in(e1,x1) & n_thing(x1) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_child(x2) & n_slum(x1))