[Travis] often goes out for lunch with his sister, [June]. [Dale] liked to play catch with his daughter [June].
('Travis', 'Dale')
[Travis] often goes out for lunch with his sister, [June]. [Dale] liked to play catch with his daughter [June].
[{('Travis', 'father', 'Dale'): [('Travis', 'sister', 'June'), ('June', 'father', 'Dale')]}]
['sister', 'father']