The security guard is smiling.
A security guard is smiling holding his grandson.
There is no implication of him holding his grandson.
exists e1 x1 x2.(n_guard(x1) & of(x1,x2) & n_security(x2) & Actor(e1,x1) & v_smile(e1))
exists e1 p1 x1 x2 x3.(exists e2.(Theme(e2,x3) & Actor(e2,x1) & v_hold(e2)) & n_grandson(x3) & of(x3,x1) & n_male(x1) & Topic(e1,p1) & Actor(e1,x1) & v_smile(e1) & n_guard(x1) & of(x1,x2) & n_security(x2))