[Theodore]'s wife, [Pamela], just went to graduate. [Pamela] went on a vacation with her brother [Chris]. [Lena] and her son [Chris] had lunch together at a local Chinese restaurant.
('Theodore', 'Lena')
[Theodore]'s wife, [Pamela], just went to graduate. [Pamela] went on a vacation with her brother [Chris]. [Lena] and her son [Chris] had lunch together at a local Chinese restaurant.
[{('Theodore', 'mother-in-law', 'Lena'): [('Theodore', 'wife', 'Pamela'), ('Pamela', 'mother', 'Lena')]}, {('Pamela', 'mother', 'Lena'): [('Pamela', 'brother', 'Chris'), ('Chris', 'mother', 'Lena')]}]
['wife', 'brother', 'mother']