[James] took his granddaughter [Wilhelmina] for ice cream. [Pete], [Wilhelmina]'s brother, stayed home. [James] and his wife, [Frances], went out to the movies for a date.
('Frances', 'Pete')
[James] and his wife, [Frances], went out to the movies for a date. [James] took his granddaughter [Wilhelmina] for ice cream. [Pete], [Wilhelmina]'s brother, stayed home.
[{('Frances', 'grandson', 'Pete'): [('Frances', 'granddaughter', 'Wilhelmina'), ('Wilhelmina', 'brother', 'Pete')]}, {('Frances', 'granddaughter', 'Wilhelmina'): [('Frances', 'husband', 'James'), ('James', 'granddaughter', 'Wilhelmina')]}]
['husband', 'granddaughter', 'brother']