A woman is about to fall off a scooter.
A woman is on a scooter.
Falling off a scooter implies being on a scooter.
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 s2 x2.(n_scooter(x2) & Time(e1,x2) & a_off(s2) & Manner(e1,s2) & Actor(e1,x1) & v_fall(e1)) & n_woman(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_scooter(x2)) & n_woman(x1))