[Pete] bought a new refrigerator for his mother [Cindy]. [Wilhelmina] and her mother [Cindy] visited her grandfather [James]
('Pete', 'James')
[Pete] bought a new refrigerator for his mother [Cindy]. [Wilhelmina] and her mother [Cindy] visited her grandfather [James]
[{('Pete', 'grandfather', 'James'): [('Pete', 'sister', 'Wilhelmina'), ('Wilhelmina', 'grandfather', 'James')]}, {('Pete', 'sister', 'Wilhelmina'): [('Pete', 'mother', 'Cindy'), ('Cindy', 'daughter', 'Wilhelmina')]}]
['mother', 'daughter', 'grandfather']