[Marie] likes taking her son [Ronald] to school. [Angelica] loves spending time with her father. His name is [Robert]. [Ronald] and his sister [Angelica] took their father out to eat for his birthday. They had a great time. [Lizzie] asked her father [Robert] if she could spend the night with a friend and he said okay.
('Marie', 'Lizzie')
[Marie] likes taking her son [Ronald] to school. [Ronald] and his sister [Angelica] took their father out to eat for his birthday. They had a great time. [Angelica] loves spending time with her father. His name is [Robert]. [Lizzie] asked her father [Robert] if she could spend the night with a friend and he said okay.
[{('Marie', 'daughter', 'Lizzie'): [('Marie', 'son', 'Ronald'), ('Ronald', 'sister', 'Lizzie')]}, {('Ronald', 'sister', 'Lizzie'): [('Ronald', 'father', 'Robert'), ('Robert', 'daughter', 'Lizzie')]}, {('Ronald', 'father', 'Robert'): [('Ronald', 'sister', 'Angelica'), ('Angelica', 'father', 'Robert')]}]
['son', 'sister', 'father', 'daughter']