Man sweeping the street outside.
There is no man sweeping the street outside.
There either is a man or no man, not both.
exists e1 x1 x2 x3 x4.(n_outside(x3) & of(x3,x4) & n_street(x4) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_sweep(e1) & (x1 = x2) & n_man(x1))
exists p1 x1 x4 x5.(n_outside(x4) & of(x4,x5) & n_street(x5) & -exists e1 x2 x3.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_sweep(e1) & (x2 = x3) & n_man(x2)))