[Hugh]'s sister, [Cindy], bought movie tickets at a discount rate. [Anna] and her sister [Natasha] braided each other's hair before school. [Natasha] and her mother [Cindy] went to volunteer at the homeless shelter last weekend.
('Hugh', 'Anna')
[Hugh]'s sister, [Cindy], bought movie tickets at a discount rate. [Natasha] and her mother [Cindy] went to volunteer at the homeless shelter last weekend. [Anna] and her sister [Natasha] braided each other's hair before school.
[{('Hugh', 'niece', 'Anna'): [('Hugh', 'sister', 'Cindy'), ('Cindy', 'daughter', 'Anna')]}, {('Cindy', 'daughter', 'Anna'): [('Cindy', 'daughter', 'Natasha'), ('Natasha', 'sister', 'Anna')]}]
['sister', 'daughter', 'sister']