[Lizzie] took her uncle [Pedro] to the grocery store. [Robert] does n't trust just anybody to watch his daughter [Lizzie] when he's away. [Robert]'s sister [Tracy] is about the only person he ever leaves his daughter with. [Tracy] was so proud of her daughter [Laura] for getting straight A's this semester.
('Laura', 'Pedro')
[Tracy] was so proud of her daughter [Laura] for getting straight A's this semester. [Robert] does n't trust just anybody to watch his daughter [Lizzie] when he's away. [Robert]'s sister [Tracy] is about the only person he ever leaves his daughter with. [Lizzie] took her uncle [Pedro] to the grocery store.
[{('Laura', 'uncle', 'Pedro'): [('Laura', 'mother', 'Tracy'), ('Tracy', 'brother', 'Pedro')]}, {('Tracy', 'brother', 'Pedro'): [('Tracy', 'brother', 'Robert'), ('Robert', 'brother', 'Pedro')]}, {('Robert', 'brother', 'Pedro'): [('Robert', 'daughter', 'Lizzie'), ('Lizzie', 'uncle', 'Pedro')]}]
['mother', 'brother', 'daughter', 'uncle']