[Andrea] took her mother, [Lillian], out for lunch. [John] surprised his wife, [Andrea], with a party to celebrate their anniversary.
('John', 'Lillian')
[John] surprised his wife, [Andrea], with a party to celebrate their anniversary. [Andrea] took her mother, [Lillian], out for lunch.
[{('John', 'mother-in-law', 'Lillian'): [('John', 'wife', 'Andrea'), ('Andrea', 'mother', 'Lillian')]}]
['wife', 'mother']