[Michael] is going to the arcade with his sister, [Jennifer]. [Jennifer]'s sister, [Nicole], needed help fixing her car. [Nicole]'s father, [Louis], offered to do it for her. [Louis] and his father [Harold] played video games all day last Saturday.
('Michael', 'Harold')
[Michael] is going to the arcade with his sister, [Jennifer]. [Jennifer]'s sister, [Nicole], needed help fixing her car. [Nicole]'s father, [Louis], offered to do it for her. [Louis] and his father [Harold] played video games all day last Saturday.
[{('Michael', 'grandfather', 'Harold'): [('Michael', 'father', 'Louis'), ('Louis', 'father', 'Harold')]}, {('Michael', 'father', 'Louis'): [('Michael', 'sister', 'Jennifer'), ('Jennifer', 'father', 'Louis')]}, {('Jennifer', 'father', 'Louis'): [('Jennifer', 'sister', 'Nicole'), ('Nicole', 'father', 'Louis')]}]
['sister', 'sister', 'father', 'father']