Couple waiting on sidewalk.
The couple is about to cross the street.
Just because Couple waiting on sidewalk does not mean that they are about to cross the street.
exists e1 x1 x2.(on(e1,x2) & n_sidewalk(x2) & Actor(e1,x1) & v_wait(e1) & n_couple(x1))
exists p1 s1 x1 x2.(n_street(x2) & n_couple(x1) & Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_cross(e1)))