[James]'s grandson, [Richard], and his wife, [Frances], were playing frisbee at the park. [Richard]'s sister, [Carrie], showed up at noon with tea and sandwiches.
('Frances', 'Carrie')
[James]'s grandson, [Richard], and his wife, [Frances], were playing frisbee at the park. [Richard]'s sister, [Carrie], showed up at noon with tea and sandwiches.
[{('Frances', 'granddaughter', 'Carrie'): [('Frances', 'grandson', 'Richard'), ('Richard', 'sister', 'Carrie')]}, {('Frances', 'grandson', 'Richard'): [('Frances', 'husband', 'James'), ('James', 'grandson', 'Richard')]}]
['husband', 'grandson', 'sister']