[John] invited his daughter [Laura] to dinner. [Laura]'s husband [Adan] joined her.
('Adan', 'John')
[John] invited his daughter [Laura] to dinner. [Laura]'s husband [Adan] joined her.
[{('Adan', 'father-in-law', 'John'): [('Adan', 'wife', 'Laura'), ('Laura', 'father', 'John')]}]