Some people on motorcycles are riding down the road in the same direction as a trolley car.
Some people are riding motorcycles.
Being on motorcycles means they are riding motorcycles.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_direction(x4) & a_same(s1) & Theme(s1,x4) & n_road(x3) & in(e1,x4) & as(x4,x5) & n_car(x5) & of(x5,x6) & n_trolley(x6) & down(e1,x3) & Actor(e1,x1) & v_ride(e1) & on(x1,x2) & n_motorcycle(x2) & n_people(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & n_people(x1))