[Jennifer] was playing tag with her father [Nicholas]. [Jennifer] is a sister of [Dennis].
('Dennis', 'Nicholas')
[Jennifer] is a sister of [Dennis]. [Jennifer] was playing tag with her father [Nicholas].
[{('Dennis', 'father', 'Nicholas'): [('Dennis', 'sister', 'Jennifer'), ('Jennifer', 'father', 'Nicholas')]}]
['sister', 'father']