[James] and his wife [June] went to a baseball game today. [June] and her father, [Dale], went to the carnival. [Dale] took [June] on the Tilt-o-Whirl.
('James', 'Dale')
[James] and his wife [June] went to a baseball game today. [June] and her father, [Dale], went to the carnival. [Dale] took [June] on the Tilt-o-Whirl.
[{('James', 'father-in-law', 'Dale'): [('James', 'wife', 'June'), ('June', 'father', 'Dale')]}]
['wife', 'father']