[Rosetta]'s mother [Theresa] had given her a gift certificate so [Rosetta] took her sister [Belva] out to eat.
('Belva', 'Theresa')
[Rosetta]'s mother [Theresa] had given her a gift certificate so [Rosetta] took her sister [Belva] out to eat.
[{('Belva', 'mother', 'Theresa'): [('Belva', 'sister', 'Rosetta'), ('Rosetta', 'mother', 'Theresa')]}]
['sister', 'mother']