A person on a bicycle goes down the street.
The person is riding in a road race.
A bicyclist going down the street does not mean that he is riding in a road race.
exists e1 x1 x2 x3.(n_street(x3) & down(e1,x3) & Actor(e1,x1) & v_go(e1) & on(x1,x2) & n_bicycle(x2) & n_person(x1))
exists e1 x1 x2 x3.(n_person(x1) & in(e1,x2) & n_race(x2) & of(x2,x3) & n_road(x3) & Actor(e1,x1) & v_ride(e1))