[Dennis] and his father [Nicholas] help [Nicholas]'s mother [Ashley] move into a nursing home.
('Ashley', 'Dennis')
[Dennis] and his father [Nicholas] help [Nicholas]'s mother [Ashley] move into a nursing home.
[{('Ashley', 'grandson', 'Dennis'): [('Ashley', 'son', 'Nicholas'), ('Nicholas', 'son', 'Dennis')]}]
['son', 'son']