[Lynn] takes her son [Joseph] to the park every Saturday. [James] and his son, [Joshua], came back from a long day's work. [Joshua]'s wife, [Lynn], had a hot meal prepared and waiting for them.
('James', 'Joseph')
[James] and his son, [Joshua], came back from a long day's work. [Joshua]'s wife, [Lynn], had a hot meal prepared and waiting for them. [Lynn] takes her son [Joseph] to the park every Saturday.
[{('James', 'grandson', 'Joseph'): [('James', 'son', 'Joshua'), ('Joshua', 'son', 'Joseph')]}, {('Joshua', 'son', 'Joseph'): [('Joshua', 'wife', 'Lynn'), ('Lynn', 'son', 'Joseph')]}]
['son', 'wife', 'son']