You stole my song

My opinion is that Brian is right because in the story tells us  that Sarah gave that poem to Brian so it belongs to him. The whole poem was written more than 10 years ago, so the copyright would be expired. The thing that Sarah would is that maybe they can join and work together so in  the future she can get the profit  and both of them will win. If she was very passion about her poem she would of done a copyright in the first place to show him she made the poem.