A man wearing sunglasses is riding a scooter.
a person is sitting on a scooter
A man is a  person , riding a scooter implies sitting on a scooter
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_ride(e2) & n_scooter(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_sunglass(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_scooter(x2) & Actor(e1,x1) & v_sit(e1) & n_person(x1))