a bmx rider gets a lot of air.
A person is on a bmx bike
A bmx rider is a person.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_get(e1) & of(x3,x4) & n_air(x4) & n_lot(x3) & n_rider(x1) & of(x1,x2) & n_bmx(x2))
exists p1 x1.(exists x2 x3.(on(x1,x2) & n_bike(x2) & of(x2,x3) & n_bmx(x3)) & n_person(x1))