[Cindy]'s son, [Richard], went with her to the store to buy candy for Halloween. [Francisco] met his son [Wayne] for dinner. Unfortunately [Francisco]'s son [Richard] could not attend.
('Cindy', 'Wayne')
[Cindy]'s son, [Richard], went with her to the store to buy candy for Halloween. [Francisco] met his son [Wayne] for dinner. Unfortunately [Francisco]'s son [Richard] could not attend.
[{('Cindy', 'son', 'Wayne'): [('Cindy', 'son', 'Richard'), ('Richard', 'brother', 'Wayne')]}, {('Richard', 'brother', 'Wayne'): [('Richard', 'father', 'Francisco'), ('Francisco', 'son', 'Wayne')]}]
['son', 'father', 'son']