[Robert] 'wife [Marie] went with him to a cruise. [Marie]'s daughter [Elsie] stayed home and studied. [Lizzie]'s uncle [Antonio] was looking forward to visiting for the summer. [Lizzie] and her sister [Elsie] were fighting. They never fight long though, and they made up the next day.
('Robert', 'Antonio')
[Robert] 'wife [Marie] went with him to a cruise. [Marie]'s daughter [Elsie] stayed home and studied. [Lizzie] and her sister [Elsie] were fighting. They never fight long though, and they made up the next day. [Lizzie]'s uncle [Antonio] was looking forward to visiting for the summer.
[{('Robert', 'brother', 'Antonio'): [('Robert', 'daughter', 'Lizzie'), ('Lizzie', 'uncle', 'Antonio')]}, {('Robert', 'daughter', 'Lizzie'): [('Robert', 'daughter', 'Elsie'), ('Elsie', 'sister', 'Lizzie')]}, {('Robert', 'daughter', 'Elsie'): [('Robert', 'wife', 'Marie'), ('Marie', 'daughter', 'Elsie')]}]
['wife', 'daughter', 'sister', 'uncle']