[Michael] and his sister [Emily] took their father out to eat for his birthday. They had a great time. [Michael]'s brother, [Glen], recently got elected as a senator.
('Glen', 'Emily')
[Michael]'s brother, [Glen], recently got elected as a senator. [Michael] and his sister [Emily] took their father out to eat for his birthday. They had a great time.
[{('Glen', 'sister', 'Emily'): [('Glen', 'brother', 'Michael'), ('Michael', 'sister', 'Emily')]}]
['brother', 'sister']