[Amy] drove her son [Glen] to his soccer game. [Dale] was sad to learn that his sister [Amy] was not going to make it to dinner like they had planned.
('Dale', 'Glen')
[Dale] was sad to learn that his sister [Amy] was not going to make it to dinner like they had planned. [Amy] drove her son [Glen] to his soccer game.
[{('Dale', 'nephew', 'Glen'): [('Dale', 'sister', 'Amy'), ('Amy', 'son', 'Glen')]}]
['sister', 'son']