[Hugh] and his brother [Wesley] are fighting again. [Michael]'s father [Hugh] and grandfather [James] went to the park to play chess.
('Wesley', 'James')
[Hugh] and his brother [Wesley] are fighting again. [Michael]'s father [Hugh] and grandfather [James] went to the park to play chess.
[{('Wesley', 'father', 'James'): [('Wesley', 'brother', 'Hugh'), ('Hugh', 'father', 'James')]}, {('Hugh', 'father', 'James'): [('Hugh', 'son', 'Michael'), ('Michael', 'grandfather', 'James')]}]
['brother', 'son', 'grandfather']