A dirt bike rider is in the air pulling off a trick.
A biker is doing a trick.
Doing a trick implies riding the dirt bike.
exists p1 x1 x2 x3 x4.(n_air(x4) & exists e1 s1 x5 x6.(in(x1,x4) & a_off(s1) & Manner(e1,s1) & Theme(e1,x6) & Actor(e1,x5) & v_pull(e1) & n_trick(x6) & (x4 = x5)) & n_rider(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_biker(x1))