An older male is holding an infant while sitting down.
An old man holding his grand daughter.
Just because the older male is holding an infant, doesn't mean that it is necessarily his grand daughter.
exists e2 e1 s1 s2 x1 x2.(while(e1,e2) & a_down(s2) & Manner(e2,s2) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_infant(x2) & n_male(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_daughter(x3) & a_grand(s2) & Theme(s2,x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))