[Richard] tripped his brother [Pete] in the living room. [Cindy] asked her son [Richard] to help her fix her television. [Frances] and her daughter [Cindy] went out for ice cream. [Frances] got a cone and [Cindy] got a sundae.
('Frances', 'Pete')
[Frances] and her daughter [Cindy] went out for ice cream. [Frances] got a cone and [Cindy] got a sundae. [Cindy] asked her son [Richard] to help her fix her television. [Richard] tripped his brother [Pete] in the living room.
[{('Frances', 'grandson', 'Pete'): [('Frances', 'daughter', 'Cindy'), ('Cindy', 'son', 'Pete')]}, {('Cindy', 'son', 'Pete'): [('Cindy', 'son', 'Richard'), ('Richard', 'brother', 'Pete')]}]
['daughter', 'son', 'brother']