[John]'s father, [George], wanted to build a house. [George]'s brother, [Nicholas], is an architect and helped a lot.
('John', 'Nicholas')
[John]'s father, [George], wanted to build a house. [George]'s brother, [Nicholas], is an architect and helped a lot.
[{('John', 'uncle', 'Nicholas'): [('John', 'father', 'George'), ('George', 'brother', 'Nicholas')]}]
['father', 'brother']