Two children play in a construction area
Don't play in an area that's dangerous
the children are playing when it says don't play.
exists e1 x1 x2 x3.(in(e1,x2) & n_area(x2) & of(x2,x3) & n_construction(x3) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_2(x1))
exists x1.(-exists e1 s1 x2 x3.(in(e1,x2) & Theme(s1,x3) & a_dangerous(s1) & (x2 = x3) & n_area(x2) & Actor(e1,x1) & v_play(e1)) & n_thing(x1))