[June] waited for her mother [Theresa] to pick her up at the bus stop. While she waited, she called her sister [Belva] on the phone.
('Belva', 'Theresa')
[June] waited for her mother [Theresa] to pick her up at the bus stop. While she waited, she called her sister [Belva] on the phone.
[{('Belva', 'mother', 'Theresa'): [('Belva', 'sister', 'June'), ('June', 'mother', 'Theresa')]}]
['sister', 'mother']