First Fight<br>Tom was into boxing. He was about to have his first amateur match. Tom won but had a lot of issues. It was a good learning experience. Tom kept getting better.
Tom didn't have a dog
Just in reading the passage above, there is no possible way you can determine whether or not Tom had a dog. He might have had a dog or he might not have, but it wasn't certain.
( z0 have :ARG0 ( z1 person :name ( z2 name :op "Tom" ) ) :ARG1 ( z3 dog ) :polarity - )
(z0 / have-03
    :ARG0 (z1 / person
              :name (z2 / name
                        :op1 "Tom"))
    :ARG1 (z3 / dog)
    :polarity -)
Tom did n't have a dog
z1 :name z2
z2 :op1 1
z0 :polarity 0
z0 :ARG0 z1
z0 :ARG1 z3