[Dorothy] went on a fishing trip with her youngest child, [James], and her brother [Robert]. [James] wanted to play at the park so his mother got her sister, [Tracy], to take him. [Harold] took his son [Robert] to school this morning because he missed the bus.
('Harold', 'Tracy')
[Harold] took his son [Robert] to school this morning because he missed the bus. [Dorothy] went on a fishing trip with her youngest child, [James], and her brother [Robert]. [James] wanted to play at the park so his mother got her sister, [Tracy], to take him.
[{('Harold', 'daughter', 'Tracy'): [('Harold', 'son', 'Robert'), ('Robert', 'sister', 'Tracy')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'sister', 'Tracy')]}, {('Dorothy', 'sister', 'Tracy'): [('Dorothy', 'son', 'James'), ('James', 'aunt', 'Tracy')]}]
['son', 'sister', 'son', 'aunt']