Motorcycles are parked behind a fence on a crowded street.
People are riding the motorcycles
parked and riding motorcycles are cannot be same.
exists e1 s1 x1 x2 x3.(behind(e1,x2) & on(x2,x3) & n_street(x3) & a_crowded(s1) & Theme(s1,x3) & n_fence(x2) & Theme(e1,x1) & v_park(e1) & n_motorcycle(x1))
exists e1 x1 x2.(n_motorcycle(x2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_people(x1))