[Nancy]'s daughter, [Linda], just graduated high school. [Nancy] and her son [Robert] had lunch together at a local Chinese restaurant.
('Robert', 'Linda')
[Nancy] and her son [Robert] had lunch together at a local Chinese restaurant. [Nancy]'s daughter, [Linda], just graduated high school.
[{('Robert', 'sister', 'Linda'): [('Robert', 'mother', 'Nancy'), ('Nancy', 'daughter', 'Linda')]}]
['mother', 'daughter']