[Frances] took her grandson, [Pete], and his sister, [Anna], to the zoo. [Frances]'s husband, [James], had to go to work instead.
('James', 'Anna')
[Frances] took her grandson, [Pete], and his sister, [Anna], to the zoo. [Frances]'s husband, [James], had to go to work instead.
[{('James', 'granddaughter', 'Anna'): [('James', 'wife', 'Frances'), ('Frances', 'granddaughter', 'Anna')]}, {('Frances', 'granddaughter', 'Anna'): [('Frances', 'grandson', 'Pete'), ('Pete', 'sister', 'Anna')]}]
['wife', 'grandson', 'sister']