A dog jumps over a barrier in a field.
A dog is chasing a cat into a field.
Just because a dog is jumping over a barrier does not necessarily mean the dog is chasing a cat.
exists e1 x1 x2 x3.(over(e1,x2) & in(x2,x3) & n_field(x3) & n_barrier(x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))
exists e1 x1 x2 x3.(into(e1,x3) & n_field(x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_cat(x2) & n_dog(x1))