Arborist tries to climb tree.
Someone is climbing trees
The Arborist is climbing the tree.
exists e1 p1 x1.(ne_nam_arborist(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_climb(e2) & n_tree(x2)))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_tree(x2) & n_person(x1))