[Pamela] saw her mother, [Lena], at the mall. [Lena] was there shopping with her son [Chris]. [Chris] and his uncle [Hugh] are two of the best poker players in town.
('Pamela', 'Hugh')
[Pamela] saw her mother, [Lena], at the mall. [Lena] was there shopping with her son [Chris]. [Chris] and his uncle [Hugh] are two of the best poker players in town.
[{('Pamela', 'uncle', 'Hugh'): [('Pamela', 'mother', 'Lena'), ('Lena', 'brother', 'Hugh')]}, {('Lena', 'brother', 'Hugh'): [('Lena', 'son', 'Chris'), ('Chris', 'uncle', 'Hugh')]}]
['mother', 'son', 'uncle']