a couple walking down the street carrying bags
A couple walking up the street carrying cheese.
If people are walking down the street, they are not walking up the street.
exists e1 x1 x2 x3 x4 x5.(n_bag(x3) & of(x3,x5) & n_carrying(x5) & of(x3,x4) & n_street(x4) & a_topic(x1) & down(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_couple(x1))
exists e1 e2 s1 x1 x2 x3 x4.(n_street(x3) & a_topic(x1) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x2) & v_carry(e2) & n_cheese(x4) & a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_couple(x1))