While in her second year at the Juilliard School of Music in New York City, Ann Rylands had a chance to borrow for one month a rare Guadagnini violin, made in 1768. She returned the violin to the owner in Philadelphia, but telephoned her father to ask if he would buy it for her. He borrowed money from his pension fund and paid the owner. Ann traveled to Philadelphia to pick up the violin. She had exclusive possession of the violin for the next 20 years, using it in her professional career. Unfortunately, she became an alcoholic, and during one period when she was in a treatment center, she entrusted the violin to her mother for safekeeping. At about that time, her father died. When Ann was released from the center, she requested return of the violin, but her mother refused. Who owns the violin?