A tan dog is running fast through tall green grass.
A dog chasing squirrels through tall green grass.
Just because a dog is running fast, it doesn't have to mean that it is chasing squirrels.
exists e1 s1 s2 s3 s4 x1 x2.(through(e1,x2) & n_grass(x2) & a_green(s4) & Theme(s4,x2) & a_tall(s3) & Theme(s3,x2) & a_fast(s2) & Manner(e1,s2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_tan(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(through(e1,x3) & n_grass(x3) & a_green(s2) & Theme(s2,x3) & a_tall(s1) & Theme(s1,x3) & Actor(e1,x1) & v_squirrel(e1) & n_chasing(x1) & of(x1,x2) & n_dog(x2))