A homeless man holding a sign.
The man is sitting by the side of a building.
A homeless person holding a sign does not necessarily sit by the side of a building.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_sign(x3) & (x1 = x2) & n_man(x1) & a_homeless(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_side(x2) & n_man(x1) & by(e1,x2) & of(x2,x3) & n_building(x3) & Actor(e1,x1) & v_sit(e1))