[David] took her son, [Michael], to go get baked goods from the local bakery. [Michael] loves his grandmother, [Frances]. She loves him, too. [David] and her sister [Lena] braided each other's hair before school.
('Lena', 'Frances')
[David] and her sister [Lena] braided each other's hair before school. [David] took her son, [Michael], to go get baked goods from the local bakery. [Michael] loves his grandmother, [Frances]. She loves him, too.
[{('Lena', 'mother', 'Frances'): [('Lena', 'sister', 'David'), ('David', 'mother', 'Frances')]}, {('David', 'mother', 'Frances'): [('David', 'son', 'Michael'), ('Michael', 'grandmother', 'Frances')]}]
['sister', 'son', 'grandmother']