[Robert] and his daughter, [Lizzie] go to concerts every week. [Elsie] celebrated her anniversary with her husband [Ronald]. [Robert] decided to give his son [Ronald], for his birthday, the latest version of Apple watch. [Lizzie]'s mom, [Marie], has recently taken art classes.
('Elsie', 'Marie')
[Elsie] celebrated her anniversary with her husband [Ronald]. [Robert] decided to give his son [Ronald], for his birthday, the latest version of Apple watch. [Robert] and his daughter, [Lizzie] go to concerts every week. [Lizzie]'s mom, [Marie], has recently taken art classes.
[{('Elsie', 'mother-in-law', 'Marie'): [('Elsie', 'husband', 'Ronald'), ('Ronald', 'mother', 'Marie')]}, {('Ronald', 'mother', 'Marie'): [('Ronald', 'sister', 'Lizzie'), ('Lizzie', 'mother', 'Marie')]}, {('Ronald', 'sister', 'Lizzie'): [('Ronald', 'father', 'Robert'), ('Robert', 'daughter', 'Lizzie')]}]
['husband', 'father', 'daughter', 'mother']