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