Construction site surrounded by chain link fence.
The construction site has no surrounding fence.
The construction site cannot have no surrounding fence while being surrounded by a chain link fence
exists e1 x1 x2 x3 x4 x5.(Actor(e1,x3) & Time(x3,x5) & n_fence(x5) & n_link(x3) & of(x3,x4) & n_chain(x4) & Theme(e1,x1) & v_surround(e1) & n_site(x1) & of(x1,x2) & n_construction(x2))
exists x1 x2.(n_site(x1) & of(x1,x2) & n_construction(x2) & -exists e2 e1 x3.(Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & n_fence(x3) & Actor(e1,x3) & v_surround(e1)))