[Dennis]'s father, [Nicholas], bought him some ice cream. [Dennis]'s wife [Emily] is planning a surprise birthday party for him.
('Emily', 'Nicholas')
[Dennis]'s wife [Emily] is planning a surprise birthday party for him. [Dennis]'s father, [Nicholas], bought him some ice cream.
[{('Emily', 'father-in-law', 'Nicholas'): [('Emily', 'husband', 'Dennis'), ('Dennis', 'father', 'Nicholas')]}]
['husband', 'father']