[Wilhelmina] and her brother [Leonard] sat down together to clip coupons. [Anna] invited her sister [Wilhelmina] and her grandmother [Frances] to her baby shower.
('Leonard', 'Frances')
[Wilhelmina] and her brother [Leonard] sat down together to clip coupons. [Anna] invited her sister [Wilhelmina] and her grandmother [Frances] to her baby shower.
[{('Leonard', 'grandmother', 'Frances'): [('Leonard', 'sister', 'Wilhelmina'), ('Wilhelmina', 'grandmother', 'Frances')]}, {('Wilhelmina', 'grandmother', 'Frances'): [('Wilhelmina', 'sister', 'Anna'), ('Anna', 'grandmother', 'Frances')]}]
['sister', 'sister', 'grandmother']