A man is sitting on a silver scooter.
A man is about to drive a scooter.
A man about to drive a  silver scooter.
exists e1 x1 x2 x3.(on(e1,x2) & n_scooter(x2) & of(x2,x3) & n_silver(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_scooter(x2)) & n_man(x1))