[Dale] bought a book for his son [Nicolas]. [Charlotte] celebrated her anniversary with her husband [Nicolas].
('Charlotte', 'Dale')
[Charlotte] celebrated her anniversary with her husband [Nicolas]. [Dale] bought a book for his son [Nicolas].
[{('Charlotte', 'father-in-law', 'Dale'): [('Charlotte', 'husband', 'Nicolas'), ('Nicolas', 'father', 'Dale')]}]
['husband', 'father']