[Hugh] took his nephew [Chris] to a new amusement park that had just opened last weekend. [Lena] took her son [Chris] to [Cindy] ([Lena]'s sister) birthday party.
('Cindy', 'Hugh')
[Lena] took her son [Chris] to [Cindy] ([Lena]'s sister) birthday party. [Hugh] took his nephew [Chris] to a new amusement park that had just opened last weekend.
[{('Cindy', 'brother', 'Hugh'): [('Cindy', 'sister', 'Lena'), ('Lena', 'brother', 'Hugh')]}, {('Lena', 'brother', 'Hugh'): [('Lena', 'son', 'Chris'), ('Chris', 'uncle', 'Hugh')]}]
['sister', 'son', 'uncle']