[David] took her father [James] out to dinner one day and also brought along her son [Michael]. [Hugh] 'son [Michael] could not believe that his father bought him a coffee machine for his birthday.
('Hugh', 'James')
[Hugh] 'son [Michael] could not believe that his father bought him a coffee machine for his birthday. [David] took her father [James] out to dinner one day and also brought along her son [Michael].
[{('Hugh', 'father', 'James'): [('Hugh', 'son', 'Michael'), ('Michael', 'grandfather', 'James')]}, {('Michael', 'grandfather', 'James'): [('Michael', 'mother', 'David'), ('David', 'father', 'James')]}]
['son', 'mother', 'father']