A dog is perched up against a tree looking at the top.
A dog is trying to climb a tree.
Being perched up against a tree does not imply trying to climb a tree.
exists e1 e2 s1 x1 x2 x3 x4.(n_top(x4) & against(e1,x2) & at(e2,x4) & Actor(e2,x3) & v_look(e2) & (x2 = x3) & n_tree(x2) & a_up(s1) & Manner(e1,s1) & Theme(e1,x1) & v_perch(e1) & n_dog(x1))
exists e1 p1 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)) & n_dog(x1))