Dog running after another dog in a grassy field.
A dog chases a dog intruding on his territory.
The other dog may not be intruding on his territory; they could be playing.
exists e1 s1 x1 x2 x3 x4.(n_dog(x2) & ne_nam_dog(x1) & after(e1,x3) & in(x3,x4) & n_field(x4) & a_grassy(s1) & Theme(s1,x4) & n_dog(x3) & -(x3 = x2) & Actor(e1,x1) & v_run(e1))
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_chase(e2) & on(e1,x4) & n_territory(x4) & of(x4,x1) & n_male(x1) & Actor(e1,x3) & v_intrude(e1) & (x2 = x3) & n_dog(x2) & n_dog(x1))