People waiting at a light on bikes.
Men and women on their motorcycles, wearing helmets and protective jackets.
Not all bikes are considered motorcycles. Not all people using bikes wear helmets and protective jackets.
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & on(x3,x4) & n_bike(x4) & n_light(x3) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_people(x1))
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(a_topic(s1) & subset_of(x2,s1) & on(x2,x3) & n_jacket(x7) & a_protective(s2) & Theme(s2,x7) & n_helmet(x6) & subset_of(x7,x5) & subset_of(x6,x5) & Actor(e1,x5) & v_wear(e1) & n_motorcycle(x4) & subset_of(x5,x3) & subset_of(x4,x3) & of(x3,x1) & n_thing(x1) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))