Security lining a street.
Security is guarding a parade on the street.
Lining does not imply guarding.
exists e1 x1 x2.(ne_nam_security(x1) & Theme(e1,x2) & Actor(e1,x1) & v_line(e1) & n_street(x2))
exists e1 x1 x2 x3.(n_street(x3) & ne_nam_security(x1) & Theme(e1,x2) & Actor(e1,x1) & v_guard(e1) & on(x2,x3) & n_parade(x2))