A tan and black dog walks happily through a field.
The dog is being walked by an owner
The dog could have gotten away from owner. We can't assume the dog is being walked based on the sentence.
exists e1 s1 s2 s3 x1 x2.(through(e1,x2) & n_field(x2) & a_happily(s3) & Manner(e1,s3) & Actor(e1,x1) & v_walk(e1) & n_dog(x1) & a_black(s2) & Theme(s2,x1) & a_tan(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_dog(x1) & Actor(e1,x2) & n_owner(x2) & Theme(e1,x1) & v_walk(e1))