[Joshua] went to the park with his father, [James]. [Lynn]'s biggest accomplishment is raising her son [Thomas]. [Joshua] bought a book for his son [Thomas].
('Lynn', 'James')
[Lynn]'s biggest accomplishment is raising her son [Thomas]. [Joshua] bought a book for his son [Thomas]. [Joshua] went to the park with his father, [James].
[{('Lynn', 'father', 'James'): [('Lynn', 'son', 'Thomas'), ('Thomas', 'grandfather', 'James')]}, {('Thomas', 'grandfather', 'James'): [('Thomas', 'father', 'Joshua'), ('Joshua', 'father', 'James')]}]
['son', 'father', 'father']