A city street is being cleaned by a man in a green vehicle.
A man is cleaning a street by using a street sweeper.
Cleaning a street does not imply using a street sweeper.
exists e1 s1 x1 x2 x3 x4.(Actor(e1,x3) & in(x3,x4) & n_vehicle(x4) & a_green(s1) & Theme(s1,x4) & n_man(x3) & Theme(e1,x1) & v_clean(e1) & n_street(x1) & of(x1,x2) & n_city(x2))
exists e2 e1 x1 x2 x3 x4.(by(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_use(e2) & n_sweeper(x3) & of(x3,x4) & n_street(x4) & Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & n_street(x2) & n_man(x1))