[Gloria] went on a vacation with her brother [Bobby]. [James] took his daughter [David] to a theater production. [David] left her daughter [Gloria] at home with a babysitter.
('James', 'Bobby')
[James] took his daughter [David] to a theater production. [David] left her daughter [Gloria] at home with a babysitter. [Gloria] went on a vacation with her brother [Bobby].
[{('James', 'grandson', 'Bobby'): [('James', 'daughter', 'David'), ('David', 'son', 'Bobby')]}, {('David', 'son', 'Bobby'): [('David', 'daughter', 'Gloria'), ('Gloria', 'brother', 'Bobby')]}]
['daughter', 'daughter', 'brother']