[Marie]'s son called [Mario] is good and intelligent boy [Marie] realized that her father [Harold] was gay. [Louis] and his son, [Michael], went to visit [Harold]. [Michael] is always so happy to go see his grandfather.
('Louis', 'Mario')
[Louis] and his son, [Michael], went to visit [Harold]. [Michael] is always so happy to go see his grandfather. [Marie] realized that her father [Harold] was gay. [Marie]'s son called [Mario] is good and intelligent boy
[{('Louis', 'nephew', 'Mario'): [('Louis', 'sister', 'Marie'), ('Marie', 'son', 'Mario')]}, {('Louis', 'sister', 'Marie'): [('Louis', 'father', 'Harold'), ('Harold', 'daughter', 'Marie')]}, {('Louis', 'father', 'Harold'): [('Louis', 'son', 'Michael'), ('Michael', 'grandfather', 'Harold')]}]
['son', 'grandfather', 'daughter', 'son']