[Hugh] favored his son [Bobby] over his other son [Johnson]. [James] loved taking his grandson [Johnson] for ice cream.
('James', 'Bobby')
[James] loved taking his grandson [Johnson] for ice cream. [Hugh] favored his son [Bobby] over his other son [Johnson].
[{('James', 'grandson', 'Bobby'): [('James', 'grandson', 'Johnson'), ('Johnson', 'brother', 'Bobby')]}, {('Johnson', 'brother', 'Bobby'): [('Johnson', 'father', 'Hugh'), ('Hugh', 'son', 'Bobby')]}]
['grandson', 'father', 'son']