[Roy] took his daughter [Martha] to the bookstore, and bought her some books from her favorite author. [Stephanie] called [Martha], her sister, to see if she wanted to go out to eat.
('Roy', 'Stephanie')
[Roy] took his daughter [Martha] to the bookstore, and bought her some books from her favorite author. [Stephanie] called [Martha], her sister, to see if she wanted to go out to eat.
[{('Roy', 'daughter', 'Stephanie'): [('Roy', 'daughter', 'Martha'), ('Martha', 'sister', 'Stephanie')]}]