A guy on a BMX bike is in midair over a dirt road in a forest after having gone off of a jump.
A guy riding on a bike.
A guy on a BXM bike is the same as a guy on a bike.
exists e1 p1 x1 x2 x3 x4.(after(p1,e1) & of(e1,x4) & n_jump(x4) & r_off(e1) & Actor(e1,x1) & v_go(e1) & exists x5 x6 x7 x8.(in(x1,x5) & over(x5,x6) & in(x6,x8) & n_forest(x8) & n_road(x6) & of(x6,x7) & n_dirt(x7) & n_midair(x5)) & on(x1,x2) & n_bike(x2) & (x2 = x3) & ne_org_bmx(x3) & n_guy(x1))
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_bike(x3) & Time(x1,x2) & n_riding(x2) & n_guy(x1))