[Dale] took the kids to a babysitter so he could have a great date with his wife, [Theresa]. [Theresa] and her father [Clarence] went for a hike in the mountains.
('Dale', 'Clarence')
[Dale] took the kids to a babysitter so he could have a great date with his wife, [Theresa]. [Theresa] and her father [Clarence] went for a hike in the mountains.
[{('Dale', 'father-in-law', 'Clarence'): [('Dale', 'wife', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['wife', 'father']