[Lorraine] received a very nice letter from her grandfather [Clarence]. [Jeff]'s sister, [Lorraine], was crying, so he told her a joke. She laughed, and felt better.
('Jeff', 'Clarence')
[Jeff]'s sister, [Lorraine], was crying, so he told her a joke. She laughed, and felt better. [Lorraine] received a very nice letter from her grandfather [Clarence].
[{('Jeff', 'grandfather', 'Clarence'): [('Jeff', 'sister', 'Lorraine'), ('Lorraine', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']