A snarling dog approaches a hissing cat.
The cat is about to scratch the dog.
A hissing cat does not always scratch the dog.
exists e1 e2 x1 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_approach(e2) & n_cat(x2) & of(x2,x3) & n_hissing(x3) & n_dog(x1) & Actor(e1,x1) & v_snarl(e1))
exists p1 s1 x1 x2.(n_dog(x2) & n_cat(x1) & Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_scratch(e1)))