[Wilhelmina] is taking her grandfather [James] shopping. [Anna] is best friends with her sister [Wilhelmina]. [Wilhelmina] does not get along with her brother [Pete].
('Pete', 'James')
[Anna] is best friends with her sister [Wilhelmina]. [Wilhelmina] does not get along with her brother [Pete]. [Wilhelmina] is taking her grandfather [James] shopping.
[{('Pete', 'grandfather', 'James'): [('Pete', 'sister', 'Anna'), ('Anna', 'grandfather', 'James')]}, {('Anna', 'grandfather', 'James'): [('Anna', 'sister', 'Wilhelmina'), ('Wilhelmina', 'grandfather', 'James')]}]
['sister', 'sister', 'grandfather']