[Jeff] was eating dinner with his wife [Heidi]. Suddenly, [Heidi] got a call from her mother, [Nancy].
('Jeff', 'Nancy')
[Jeff] was eating dinner with his wife [Heidi]. Suddenly, [Heidi] got a call from her mother, [Nancy].
[{('Jeff', 'mother-in-law', 'Nancy'): [('Jeff', 'wife', 'Heidi'), ('Heidi', 'mother', 'Nancy')]}]
['wife', 'mother']