A crowded busy dock with people standing next to a freight car either loading or unloading it.aa.
A crowded dock has people on it standing next to a freight car because the car is late for it's next unloading.
Just because a dock is busy with people unloading a freight car does not mean that the car is late for it's next unloading.
exists s1 s2 x1 x2.(a_topic(x1) & with(x1,x2) & (exists e1 x3 x4 x5.(to(e1,x4) & n_car(x4) & of(x4,x5) & n_freight(x5) & r_next(e1) & Actor(e1,x3) & v_stand(e1) & (x2 = x3)) | exists e2 x6 x7.(Theme(e2,x7) & Actor(e2,x6) & v_load(e2) & n_it.aa(x7) & (x2 = x6)) | exists e3 x8 x9.(Theme(e3,x9) & Actor(e3,x8) & v_unload(e3) & n_it.aa(x9) & (x2 = x8))) & n_people(x2) & n_dock(x1) & a_busy(s2) & Theme(s2,x1) & a_crowded(s1) & Theme(s1,x1))
exists e1 e2 p1 p2 s1 x1 x2 x3 x4 x5 x6.(exists s3 x7.((x1 = x7) & n_unload(x7) & a_next(s3) & Theme(s3,x7)) & Theme(e2,x3) & Actor(e2,x2) & v_have(e2) & exists p3 s2.(a_late(s2) & Manner(p3,s2) & for(x5,x1)) & n_thing(x1) & n_thing(x1) & n_car(x5) & n_car(x5) & because(e1,p1) & to(e1,x5) & of(x5,x6) & n_freight(x6) & r_next(e1) & Actor(e1,x4) & v_stand(e1) & (x3 = x4) & on(x3,x1) & n_people(x3) & (x1 = x2) & n_dock(x1) & a_crowded(s1) & Theme(s1,x1))