[Joshua] and his son [Thomas] went to the park and saw [Joshua]'s father [James] there with his dog. [Lynn] asked her son [Thomas] to help her fix her television.
('Lynn', 'James')
[Lynn] asked her son [Thomas] to help her fix her television. [Joshua] and his son [Thomas] went to the park and saw [Joshua]'s father [James] there with his dog.
[{('Lynn', 'father', 'James'): [('Lynn', 'son', 'Thomas'), ('Thomas', 'grandfather', 'James')]}, {('Thomas', 'grandfather', 'James'): [('Thomas', 'father', 'Joshua'), ('Joshua', 'father', 'James')]}]
['son', 'father', 'father']