[Mario]'s parents, [Robert] and [Marie], threw him a surprise party for his birthday. [Robert]'s daughter [Angelica] made a mental note to be out of town for her birthday! [Elsie] went shopping at the mall with her mother [Marie]
('Elsie', 'Angelica')
[Elsie] went shopping at the mall with her mother [Marie] [Mario]'s parents, [Robert] and [Marie], threw him a surprise party for his birthday. [Robert]'s daughter [Angelica] made a mental note to be out of town for her birthday!
[{('Elsie', 'sister', 'Angelica'): [('Elsie', 'brother', 'Mario'), ('Mario', 'sister', 'Angelica')]}, {('Elsie', 'brother', 'Mario'): [('Elsie', 'mother', 'Marie'), ('Marie', 'son', 'Mario')]}, {('Mario', 'sister', 'Angelica'): [('Mario', 'father', 'Robert'), ('Robert', 'daughter', 'Angelica')]}]
['mother', 'son', 'father', 'daughter']