[Hugh] took his son [Michael] to school this morning because he missed the bus. [Frances] took her daughter [David] to the store to find her some new boots for the cold winter weather. [Michael]'s mother [David] was present at the thanksgiving service.
('Hugh', 'Frances')
[Hugh] took his son [Michael] to school this morning because he missed the bus. [Michael]'s mother [David] was present at the thanksgiving service. [Frances] took her daughter [David] to the store to find her some new boots for the cold winter weather.
[{('Hugh', 'mother', 'Frances'): [('Hugh', 'son', 'Michael'), ('Michael', 'grandmother', 'Frances')]}, {('Michael', 'grandmother', 'Frances'): [('Michael', 'mother', 'David'), ('David', 'mother', 'Frances')]}]
['son', 'mother', 'mother']