An old couple is walking down the street holding hands.
A couple giving each other piggy back rides.
If someone is giving a piggy back rides, they are not holding hands with the other person.
exists e1 e2 s1 s2 x1 x2 x3.(n_street(x2) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hold(e2) & n_hand(x3) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_couple(x1) & a_old(s1) & Theme(s1,x1))
exists e1 x1 x2 x4.(n_piggy(x4) & Actor(e1,x1) & v_ride(e1) & all x3.((-(x3 = x4) & n_piggy(x3)) -> exists e2 s1.(a_back(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,x2) & v_give(e2))) & (x1 = x2) & n_couple(x1))