[Robert]'s wife [Marie] had been feeling under the weather. [Robert] asked his son [John] to go to the store to buy medicine. [Allan]'s grandpa [Harold] taught him and his brother [John] how to hunt and fish when they were both still very young.
('Marie', 'Harold')
[Robert]'s wife [Marie] had been feeling under the weather. [Robert] asked his son [John] to go to the store to buy medicine. [Allan]'s grandpa [Harold] taught him and his brother [John] how to hunt and fish when they were both still very young.
[{('Marie', 'father-in-law', 'Harold'): [('Marie', 'husband', 'Robert'), ('Robert', 'father', 'Harold')]}, {('Robert', 'father', 'Harold'): [('Robert', 'son', 'Allan'), ('Allan', 'grandfather', 'Harold')]}, {('Robert', 'son', 'Allan'): [('Robert', 'son', 'John'), ('John', 'brother', 'Allan')]}]
['husband', 'son', 'brother', 'grandfather']