A policeman is riding his motorcycle down the street.
A cop rides a motorcycle down the road.
A policeman is the same as a cop and the street is a road.
exists e1 x1 x2 x3.(n_street(x3) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & of(x2,x1) & n_male(x1) & n_policeman(x1))
exists e1 x1 x2 x3.(n_road(x3) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & n_cop(x1))