[Clarence] taught his granddaughter, [Belva], how to fish. [Nicolas]'s sister, [Belva], bought movie tickets at a discount rate.
('Nicolas', 'Clarence')
[Nicolas]'s sister, [Belva], bought movie tickets at a discount rate. [Clarence] taught his granddaughter, [Belva], how to fish.
[{('Nicolas', 'grandfather', 'Clarence'): [('Nicolas', 'sister', 'Belva'), ('Belva', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']