Children playing in a ball pit.
The children are kids.
Children is the same as children and children are kids.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & n_pit(x3) & of(x3,x4) & n_ball(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1))
exists p1 x1.(n_child(x1) & exists x2.((x1 = x2) & n_kid(x2)))