a man and woman walking across a street.
A couple is holding hands walking across the street.
A man and woman walking do not have to be holding hands.
exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & across(x2,x4) & n_street(x4) & n_walking(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 e2 x1 x2 x3 x4.(n_street(x4) & Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & across(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_hand(x2) & n_couple(x1))