[Dennis]'s wife [Emily] is happy to learn that [Dennis] will be coming home next week. [Dennis] asked his mother [Amy] to read to him. [Amy] was too busy.
('Emily', 'Amy')
[Dennis]'s wife [Emily] is happy to learn that [Dennis] will be coming home next week. [Dennis] asked his mother [Amy] to read to him. [Amy] was too busy.
[{('Emily', 'mother-in-law', 'Amy'): [('Emily', 'husband', 'Dennis'), ('Dennis', 'mother', 'Amy')]}]
['husband', 'mother']