A baby in a yellow shirt smiles.
A young child wearing a shirt has been tickled.
A young child is not always a baby. Not every child who smiles has been tickled.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_smile(x2) & of(x2,x3) & n_shirt(x3) & a_yellow(s1) & Theme(s1,x2) & n_baby(x1))
exists e1 e2 s1 x1 x2 x3.(Theme(e2,x1) & v_tickle(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & (x1 = x2) & n_child(x1) & a_young(s1) & Theme(s1,x1))