[Clarence] spends every weekend teaching his grandson, [Nicolas] how to do different construction projects. [Nicolas] and [Tony] are brothers who look nothing alike.
('Tony', 'Clarence')
[Nicolas] and [Tony] are brothers who look nothing alike. [Clarence] spends every weekend teaching his grandson, [Nicolas] how to do different construction projects.
[{('Tony', 'grandfather', 'Clarence'): [('Tony', 'brother', 'Nicolas'), ('Nicolas', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']