[Louise] has a lovely sister named [Heidi] and [Louise]'s mother is [Nancy]
('Nancy', 'Heidi')
[Louise] has a lovely sister named [Heidi] and [Louise]'s mother is [Nancy]
[{('Nancy', 'daughter', 'Heidi'): [('Nancy', 'daughter', 'Louise'), ('Louise', 'sister', 'Heidi')]}]
['daughter', 'sister']