Two women are conversing as they walk down the street.
The two women are riding bikes down the street.
you cannot both walk and be riding.
exists e1 p1 x1 x2.(n_street(x2) & exists e2.(down(e2,x2) & Actor(e2,x1) & v_walk(e2)) & n_thing(x1) & as(e1,p1) & Actor(e1,x1) & v_converse(e1) & n_woman(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_street(x3) & n_woman(x1) & card_eq_2(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3) & n_bike(x2))