A bicyclist falls off his bike while others watch.
The man was biking.
The man was biking because he falls off his bike.
exists e1 p1 s1 x1 x2.(exists e2 x3.(Actor(e2,x3) & v_watch(e2) & -(x3 = x1) & n_person(x3)) & n_person(x1) & while(e1,p1) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_fall(e1) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_bicyclist(x1))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_bike(e1))