[Nancy]'s brother [Nicholas] was playing with legos when [Nancy]'s mother [Ashley] came home from work.
('Ashley', 'Nicholas')
[Nancy]'s brother [Nicholas] was playing with legos when [Nancy]'s mother [Ashley] came home from work.
[{('Ashley', 'son', 'Nicholas'): [('Ashley', 'daughter', 'Nancy'), ('Nancy', 'brother', 'Nicholas')]}]
['daughter', 'brother']