[Mary] bought a nice gift for her daughter [Martha]. [Martha] bought an even more expensive gift for her own daughter [Renee].
('Mary', 'Renee')
[Mary] bought a nice gift for her daughter [Martha]. [Martha] bought an even more expensive gift for her own daughter [Renee].
[{('Mary', 'granddaughter', 'Renee'): [('Mary', 'daughter', 'Martha'), ('Martha', 'daughter', 'Renee')]}]