[Irvin] and his wife [Martha] went to a lovely anniversary dinner. [Martha] took her brother [Charles] to work Monday because his car was in the shop getting a tune up. [Lena] was unhappy with her son, [Charles], and his grades. She enlisted a tutor to help him.
('Lena', 'Irvin')
[Lena] was unhappy with her son, [Charles], and his grades. She enlisted a tutor to help him. [Martha] took her brother [Charles] to work Monday because his car was in the shop getting a tune up. [Irvin] and his wife [Martha] went to a lovely anniversary dinner.
[{('Lena', 'son-in-law', 'Irvin'): [('Lena', 'daughter', 'Martha'), ('Martha', 'husband', 'Irvin')]}, {('Lena', 'daughter', 'Martha'): [('Lena', 'son', 'Charles'), ('Charles', 'sister', 'Martha')]}]
['son', 'sister', 'husband']