[Cindy] took her son [Richard] to school this morning because he missed the bus. [Francisco] took his son [Richard] to the dentist yesterday and while there they saw [Francisco]'s sister [Lynn].
('Cindy', 'Lynn')
[Cindy] took her son [Richard] to school this morning because he missed the bus. [Francisco] took his son [Richard] to the dentist yesterday and while there they saw [Francisco]'s sister [Lynn].
[{('Cindy', 'sister', 'Lynn'): [('Cindy', 'son', 'Richard'), ('Richard', 'aunt', 'Lynn')]}, {('Richard', 'aunt', 'Lynn'): [('Richard', 'father', 'Francisco'), ('Francisco', 'sister', 'Lynn')]}]
['son', 'father', 'sister']