A large crowd of people on motorcycles and several dozen cars wait behind a crosswalk.
The bicyclists like to race on mountain trails.
He refers to people on motorcycles not bicyclists. They cannot be behind a crosswalk and on mountain trails simultaneously.
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 s1 x1 x2 x3 x4.(n_bicyclist(x1) & a_topic(x1) & like(x1,x2) & on(x2,x3) & n_trail(x3) & of(x3,x4) & n_mountain(x4) & n_race(x2) & a_to(s1) & Theme(s1,x2))