[Hugh]'s wife, [David], went to the library with her daughter, [Marie]. [James] loved teaching his son, [Hugh], baseball.
('James', 'Marie')
[James] loved teaching his son, [Hugh], baseball. [Hugh]'s wife, [David], went to the library with her daughter, [Marie].
[{('James', 'granddaughter', 'Marie'): [('James', 'son', 'Hugh'), ('Hugh', 'daughter', 'Marie')]}, {('Hugh', 'daughter', 'Marie'): [('Hugh', 'wife', 'David'), ('David', 'daughter', 'Marie')]}]
['son', 'wife', 'daughter']