[Ann] bought some shoes for her father [John]. [Robert] was enjoying spending some alone time with his wife [Ann].
('Robert', 'John')
[Robert] was enjoying spending some alone time with his wife [Ann]. [Ann] bought some shoes for her father [John].
[{('Robert', 'father-in-law', 'John'): [('Robert', 'wife', 'Ann'), ('Ann', 'father', 'John')]}]