A skydiver safely lands while another watches from the ground.
The skydiver botched his landing.
If the skydiver landed safely then he would not have botched the landing.
exists e1 s1 x1 x2 x3 x4.(n_ground(x4) & n_watch(x2) & a_safely(s1) & Manner(e1,s1) & from(e1,x4) & while(e1,x3) & n_watch(x3) & -(x3 = x2) & Actor(e1,x1) & v_land(e1) & n_skydiver(x1))
exists e1 x1 x2.(n_landing(x2) & of(x2,x1) & n_male(x1) & n_skydiver(x1) & Theme(e1,x2) & Actor(e1,x1) & v_botch(e1))