A dog on a leash tries to get over a rock wall.
The dog on the leash tried chasing the cat over the wall.
Just because a dog tried to get over the rock wall does not mean that it is chasing the cat.
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x3 x4.(over(e2,x3) & n_wall(x3) & of(x3,x4) & n_rock(x4) & Actor(e2,x1) & v_get(e2)) & on(x1,x2) & n_leash(x2) & n_dog(x1))
exists e1 p1 x1 x2 x3 x4.(n_wall(x4) & n_cat(x3) & n_leash(x2) & n_dog(x1) & exists e2.(over(e2,x4) & Theme(e2,x3) & Actor(e2,x1) & v_chase(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & on(x1,x2))