An off road bike rider is riding over a log.
The bike rider is asleep.
The bide rider cannot be riding and asleep at the same time.
exists e1 x1 x2 x3 x4.(over(e1,x4) & n_log(x4) & Actor(e1,x1) & v_ride(e1) & n_bike(x1) & Time(x1,x3) & n_rider(x3) & off(x1,x2) & n_road(x2) & n_an(x1))
exists s1 x1 x2.(n_rider(x1) & of(x1,x2) & n_bike(x2) & Theme(s1,x1) & a_asleep(s1))