A large crowd of people on motorcycles and several dozen cars wait behind a crosswalk.
The motorcycle gang and car racers wait for pedestrians to walk the street.
Answer: Crowd refers to the gang and pedestrians to walk refers to behind a crosswalk
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(behind(e1,x7) & n_crosswalk(x7) & Actor(e1,x1) & v_wait(e1) & on(x1,x3) & subset_of(x5,x3) & n_car(x5) & of(x5,x6) & n_dozen(x6) & a_several(s2) & Theme(s2,x5) & subset_of(x4,x3) & n_motorcycle(x4) & of(x1,x2) & n_people(x2) & n_crowd(x1) & a_large(s1) & Theme(s1,x1))
exists e1 p1 x1 x2 x3 x4 x5 x6 x7.(n_street(x7) & n_gang(x2) & of(x2,x3) & n_motorcycle(x3) & for(e1,x6) & n_pedestrian(x6) & Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2.(Theme(e2,x7) & Actor(e2,x1) & v_walk(e2)) & subset_of(x4,x1) & n_racer(x4) & of(x4,x5) & n_car(x5) & subset_of(x2,x1))