A man in a beret rides a bicycle down the street.
A person is on a vehicle.
A bicycle is a type of "vehicle".
exists e1 x1 x2 x3 x4.(n_street(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & down(x3,x4) & n_bicycle(x3) & in(x1,x2) & n_beret(x2) & n_man(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_vehicle(x2)) & n_person(x1))