A biker rides a motorcycle on a racetrack
There is a biker outside.
Racetrack is generally outside and motorcycle is rode by biker.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & on(x2,x3) & n_racetrack(x3) & n_motorcycle(x2) & n_biker(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_outside(x2) & of(x2,x3) & n_biker(x3))