[Frances] and [James] [Frances]'s daughter, [David], just graduated high school. [David] took her son [Michael] to the park for the afternoon.
('James', 'Michael')
[Frances] and [James] [Frances]'s daughter, [David], just graduated high school. [David] took her son [Michael] to the park for the afternoon.
[{('James', 'grandson', 'Michael'): [('James', 'daughter', 'David'), ('David', 'son', 'Michael')]}, {('James', 'daughter', 'David'): [('James', 'wife', 'Frances'), ('Frances', 'daughter', 'David')]}]
['wife', 'daughter', 'son']