A dog jumps over a creek.
The dog is jumping
jumps and jumping are synonymous.
exists e1 x1 x2.(over(e1,x2) & n_creek(x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_jump(e1))