[Martha] went shopping for makeup with her sister [Lois]. [Martha]'s son [Franklin] stayed at home.
('Lois', 'Franklin')
[Martha] went shopping for makeup with her sister [Lois]. [Martha]'s son [Franklin] stayed at home.
[{('Lois', 'nephew', 'Franklin'): [('Lois', 'sister', 'Martha'), ('Martha', 'son', 'Franklin')]}]