[Frances] and her husband [James] made a brisket for their son [Joshua]. [Joshua]'s son [Thomas] does n't eat brisket.
('Frances', 'Thomas')
[Frances] and her husband [James] made a brisket for their son [Joshua]. [Joshua]'s son [Thomas] does n't eat brisket.
[{('Frances', 'grandson', 'Thomas'): [('Frances', 'son', 'Joshua'), ('Joshua', 'son', 'Thomas')]}, {('Frances', 'son', 'Joshua'): [('Frances', 'husband', 'James'), ('James', 'son', 'Joshua')]}]
['husband', 'son', 'son']