[James] took his grandson [Bobby] to the lake so they could feed the ducks. [David]'s son, [Michael], never got along with [David]'s other son, [Bobby].
('James', 'Michael')
[James] took his grandson [Bobby] to the lake so they could feed the ducks. [David]'s son, [Michael], never got along with [David]'s other son, [Bobby].
[{('James', 'grandson', 'Michael'): [('James', 'grandson', 'Bobby'), ('Bobby', 'brother', 'Michael')]}, {('Bobby', 'brother', 'Michael'): [('Bobby', 'mother', 'David'), ('David', 'son', 'Michael')]}]
['grandson', 'mother', 'son']