A rider of a dirt bike is midair.
A dirt bike rider is about to land onto a box.
A rider of a dirt bike is midair does not imply rider is about to land onto a box
exists p1 x1 x2 x3.(exists x4.((x1 = x4) & n_midair(x4)) & of(x1,x2) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_rider(x1))
exists p1 s1 x1 x2 x3.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x4.(onto(e1,x4) & n_box(x4) & Actor(e1,x1) & v_land(e1)) & n_rider(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2))