A large tan dog runs after a small tan dog on a grassy yard.
A dog is being chased by another dog.
"A dog is being chased by another dog" is a rephrasing of "a...dog runs after...a dog".
exists e1 s1 s2 s3 s4 s5 x1 x2 x3.(after(e1,x2) & on(x2,x3) & n_yard(x3) & a_grassy(s5) & Theme(s5,x3) & n_dog(x2) & a_tan(s4) & Theme(s4,x2) & a_small(s3) & Theme(s3,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_tan(s2) & Theme(s2,x1) & a_large(s1) & Theme(s1,x1))
exists e1 x1 x2.(Actor(e1,x2) & n_dog(x2) & -(x2 = x1) & n_dog(x1) & n_dog(x1) & Theme(e1,x1) & v_chase(e1))