[Roy]'s wife, [Mary], was excited to plan a surprise party for him. [John] was so excited to introduce his new girlfriend to his mother, [Mary].
('Roy', 'John')
[Roy]'s wife, [Mary], was excited to plan a surprise party for him. [John] was so excited to introduce his new girlfriend to his mother, [Mary].
[{('Roy', 'son', 'John'): [('Roy', 'wife', 'Mary'), ('Mary', 'son', 'John')]}]