Biker loses control of bike in midair.
The biker crashed the bike.
Just because they lose control, does not mean they crashed.
exists e1 x1 x2 x3 x4.(ne_nam_biker(x1) & in(e1,x4) & n_midair(x4) & Theme(e1,x2) & Actor(e1,x1) & v_lose(e1) & of(x2,x3) & n_bike(x3) & n_control(x2))
exists e1 x1 x2.(n_bike(x2) & n_biker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_crash(e1))