traffic is present on the road and people are waiting to cross the road.
Chickens are crossing a road.
The beings crossing the road cannot be both people and chickens.
exists e1 p1 s1 x1 x2 x3.(n_road(x2) & n_road(x2) & Topic(e1,p1) & Actor(e1,x3) & v_wait(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x3) & v_cross(e2)) & n_people(x3) & on(s1,x2) & Theme(s1,x1) & a_present(s1) & n_traffic(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & n_road(x2) & n_chicken(x1))