[Michael] and his wife [Jennifer] meet [Jennifer]'s father [Nicholas] for dinner at the nice restaurant.
('Michael', 'Nicholas')
[Michael] and his wife [Jennifer] meet [Jennifer]'s father [Nicholas] for dinner at the nice restaurant.
[{('Michael', 'father-in-law', 'Nicholas'): [('Michael', 'wife', 'Jennifer'), ('Jennifer', 'father', 'Nicholas')]}]
['wife', 'father']