A woman smiles as she holds an infant.
A new mother smiles while holding her baby.
A woman doesn't imply new mother. The fact that she holds an infant doesn't necessarily mean that the infant is her baby.
exists e1 p1 x1.(exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & n_infant(x2)) & n_female(x1) & as(e1,p1) & Actor(e1,x1) & v_smile(e1) & n_woman(x1))
exists e2 e1 s1 x1 x2.(while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & n_baby(x2) & of(x2,x1) & n_female(x1) & Actor(e1,x1) & v_smile(e1) & n_mother(x1) & a_new(s1) & Theme(s1,x1))