[James] and his wife [Frances] made nachos for their son [Wesley]. [Wesley]'s son [Charles] ate tacos instead.
('Frances', 'Charles')
[James] and his wife [Frances] made nachos for their son [Wesley]. [Wesley]'s son [Charles] ate tacos instead.
[{('Frances', 'grandson', 'Charles'): [('Frances', 'son', 'Wesley'), ('Wesley', 'son', 'Charles')]}, {('Frances', 'son', 'Wesley'): [('Frances', 'husband', 'James'), ('James', 'son', 'Wesley')]}]
['husband', 'son', 'son']