[Chris] was playing checkers with his grandmother [Frances], when he received a call from his sister [Martha]. [James] bought an expensive ring for his wife [Frances].
('James', 'Martha')
[James] bought an expensive ring for his wife [Frances]. [Chris] was playing checkers with his grandmother [Frances], when he received a call from his sister [Martha].
[{('James', 'granddaughter', 'Martha'): [('James', 'grandson', 'Chris'), ('Chris', 'sister', 'Martha')]}, {('James', 'grandson', 'Chris'): [('James', 'wife', 'Frances'), ('Frances', 'grandson', 'Chris')]}]
['wife', 'grandson', 'sister']