A woman smiling at a baby.
Someone is smiling.
A woman smiling is inferred as Someone is smiling.
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_baby(x3) & Actor(e1,x2) & v_smile(e1) & (x1 = x2) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_smile(e1) & n_person(x1))