The man fishing while sitting on the cliff.
A man is trying to catch a fish.
"Trying to catch a fish" is another way to say fishing.
(x)
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_catch(e2) & n_fish(x2)) & n_man(x1))