A man and a woman are carrying bags down an empty street.
A couple is carrying luggage down an empty street.
Just because the couple are carrying bags does not mean they are carrying luggage as there are other types of bag.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x4) & Actor(e1,x1) & v_carry(e1) & down(x4,x5) & n_street(x5) & a_empty(s1) & Theme(s1,x5) & n_bag(x4) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & down(x2,x3) & n_street(x3) & a_empty(s1) & Theme(s1,x3) & n_luggage(x2) & n_couple(x1))