[James] went to the baseball game with his wife, [Frances]. [Frances]'s grandson [Brandon] went with them. [Brandon] and his brother [Bobby] were playing tag in the park.
('James', 'Bobby')
[James] went to the baseball game with his wife, [Frances]. [Frances]'s grandson [Brandon] went with them. [Brandon] and his brother [Bobby] were playing tag in the park.
[{('James', 'grandson', 'Bobby'): [('James', 'grandson', 'Brandon'), ('Brandon', 'brother', 'Bobby')]}, {('James', 'grandson', 'Brandon'): [('James', 'wife', 'Frances'), ('Frances', 'grandson', 'Brandon')]}]
['wife', 'grandson', 'brother']