A woman smiles at a baby while an older couple looks on.
The older couple smile at the baby laughing at the woman.
Just because the couple is watching the woman with the baby does not mean that they smile, and not all babies would be laughing when someone smiles at them.
exists e1 p1 x1 x2.(exists e2 p2 s1 x3.(exists s2.(Theme(s2,x3) & a_on(s2)) & Topic(e2,p2) & Actor(e2,x3) & v_look(e2) & n_couple(x3) & r_more(s1) & a_older(s1) & Theme(s1,x3)) & while(e1,p1) & at(e1,x2) & n_baby(x2) & Actor(e1,x1) & v_smile(e1) & n_woman(x1))
exists e1 s1 x1 x2 x3 x4 x5.(n_woman(x5) & n_baby(x3) & n_smile(x1) & of(x1,x2) & n_couple(x2) & r_more(s1) & a_older(s1) & Theme(s1,x1) & a_topic(x1) & at(x1,x3) & at(e1,x5) & Actor(e1,x4) & v_laugh(e1) & (x3 = x4))