[Robert] bought his daughter [Elsie] and son [John] a gift. [Elsie]'s sister [Michelle] did n't get anything. [Michelle] loves visiting with her aunt [Tracy].
('John', 'Tracy')
[Robert] bought his daughter [Elsie] and son [John] a gift. [Elsie]'s sister [Michelle] did n't get anything. [Michelle] loves visiting with her aunt [Tracy].
[{('John', 'aunt', 'Tracy'): [('John', 'father', 'Robert'), ('Robert', 'sister', 'Tracy')]}, {('John', 'father', 'Robert'): [('John', 'sister', 'Elsie'), ('Elsie', 'father', 'Robert')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'daughter', 'Michelle'), ('Michelle', 'aunt', 'Tracy')]}]
['sister', 'father', 'daughter', 'aunt']