[Amy] made a dress for her daughter [Mary]. [Mary]'s sister [Natalia] was so jealous.
('Natalia', 'Amy')
[Amy] made a dress for her daughter [Mary]. [Mary]'s sister [Natalia] was so jealous.
[{('Natalia', 'mother', 'Amy'): [('Natalia', 'sister', 'Mary'), ('Mary', 'mother', 'Amy')]}]
['sister', 'mother']