A police officer on a motorcycle makes his way down a Las Vegas street.
an officer is doing down a street
Doing down a street is a rephrase of makes his way down a street.
exists e1 x1 x2 x3 x4 x5 x6 x7.(Theme(e1,x4) & Actor(e1,x1) & v_make(e1) & down(x4,x5) & n_street(x5) & (x5 = x7) & ne_geo_vegas(x7) & (x5 = x6) & ne_geo_las(x6) & n_way(x4) & of(x4,x1) & n_male(x1) & on(x1,x3) & n_motorcycle(x3) & n_officer(x1) & of(x1,x2) & n_police(x2))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_street(x2) & n_officer(x1))