A dirt bike rider is midair while on a trail.
A dirt bike rider is riding his bike.
If the dirt bike rider is midair, then he is riding his bike.
exists s1 x1 x2 x3 x4.(on(s1,x4) & n_trail(x4) & r_while(s1) & Theme(s1,x1) & a_midair(s1) & n_rider(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & n_bike(x3) & of(x3,x1) & n_male(x1) & n_rider(x1) & of(x1,x3) & of(x1,x2) & n_dirt(x2))