A man repels down a cliff over water.
a man is repelling down a cliff for the first time
A man repelling down a cliff may not be doing it for the first time.
exists e1 s1 x1 x2 x3.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_repel(e1) & over(x2,x3) & n_water(x3) & n_cliff(x2) & n_man(x1))
exists e1 s1 s2 x1 x2 x3.(n_time(x3) & a_first(s2) & Theme(s2,x3) & for(e1,x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_repel(e1) & n_cliff(x2) & n_man(x1))