[Lena] loved her daughter [Tina] very much. [Tina]'s brother [Irvin] loved his wife [Martha] nearly as much
('Lena', 'Martha')
[Lena] loved her daughter [Tina] very much. [Tina]'s brother [Irvin] loved his wife [Martha] nearly as much
[{('Lena', 'daughter-in-law', 'Martha'): [('Lena', 'son', 'Irvin'), ('Irvin', 'wife', 'Martha')]}, {('Lena', 'son', 'Irvin'): [('Lena', 'daughter', 'Tina'), ('Tina', 'brother', 'Irvin')]}]
['daughter', 'brother', 'wife']