[James] was very nervous talking with his wife [June]. He was so nervous because he was going to meet [June]'s father [Dale] for the first time.
('James', 'Dale')
[James] was very nervous talking with his wife [June]. He was so nervous because he was going to meet [June]'s father [Dale] for the first time.
[{('James', 'father-in-law', 'Dale'): [('James', 'wife', 'June'), ('June', 'father', 'Dale')]}]
['wife', 'father']