[Antonio] bought a present for his son [Aaron]. His daughter [Bettie] felt let out. [Harold] took his grandson [Bernardo] to the baseball game. [Bernardo]'s brother [Aaron] hates baseball.
('Bettie', 'Harold')
[Antonio] bought a present for his son [Aaron]. His daughter [Bettie] felt let out. [Harold] took his grandson [Bernardo] to the baseball game. [Bernardo]'s brother [Aaron] hates baseball.
[{('Bettie', 'grandfather', 'Harold'): [('Bettie', 'father', 'Antonio'), ('Antonio', 'father', 'Harold')]}, {('Antonio', 'father', 'Harold'): [('Antonio', 'son', 'Aaron'), ('Aaron', 'grandfather', 'Harold')]}, {('Aaron', 'grandfather', 'Harold'): [('Aaron', 'brother', 'Bernardo'), ('Bernardo', 'grandfather', 'Harold')]}]
['father', 'son', 'brother', 'grandfather']