A baby sits in a smiling woman's lap.
A mother and child sitting together.
A baby sitting in a woman's lap does not necessarily imply a mother and her child.
exists e1 e2 x1 x2 x3.(in(e1,x3) & n_lap(x3) & of(x3,x2) & n_woman(x2) & Actor(e2,x2) & v_smile(e2) & Actor(e1,x1) & v_sit(e1) & n_baby(x1))
exists e1 s1 s2 x1 x2 x3.(a_topic(s1) & a_together(s2) & Manner(e1,s2) & Actor(e1,x3) & v_sit(e1) & (s1 = x3) & n_child(x2) & n_mother(x1) & subset_of(x2,s1) & subset_of(x1,s1))