A dirt bike rider jumps in the air.
The rider is on the ground
How can you jump in the air and be on the ground at the same time.
exists x1 x2 x3 x4 x5.(n_air(x5) & a_topic(x1) & in(x1,x5) & n_jump(x1) & of(x1,x4) & n_rider(x4) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2))
exists p1 x1 x2.(n_ground(x2) & n_rider(x1) & on(x1,x2))