Dog with big collar running.
A dog with a collar that is too big for him is running
The sentence doesn't indicate that there is a person with the dog and even though the dog has a big collar, it doesn't necessarily mean the dog is too big for a person.
exists s1 s2 x1 x2.(ne_nam_dog(s1) & a_topic(s1) & with(s1,x1) & n_running(x1) & of(x1,x2) & n_collar(x2) & a_big(s2) & Theme(s2,x1))
exists e1 s1 x1 x2 x3.(Actor(e1,x1) & v_run(e1) & with(x1,x2) & for(s1,x1) & n_male(x1) & r_too(s1) & Theme(s1,x3) & a_big(s1) & (x2 = x3) & n_collar(x2) & n_dog(x1))