[Pedro]'s sister [Beverly] asked him for some help planting her garden. [Louis] took his son [Paul] to school this morning because he missed the bus. [Beverly] is the mother of a son named [Paul]. [Harold] is frustrated teaching his son how to drive. His son is [Louis].
('Harold', 'Pedro')
[Harold] is frustrated teaching his son how to drive. His son is [Louis]. [Louis] took his son [Paul] to school this morning because he missed the bus. [Beverly] is the mother of a son named [Paul]. [Pedro]'s sister [Beverly] asked him for some help planting her garden.
[{('Harold', 'son', 'Pedro'): [('Harold', 'son', 'Louis'), ('Louis', 'brother', 'Pedro')]}, {('Louis', 'brother', 'Pedro'): [('Louis', 'son', 'Paul'), ('Paul', 'uncle', 'Pedro')]}, {('Paul', 'uncle', 'Pedro'): [('Paul', 'mother', 'Beverly'), ('Beverly', 'brother', 'Pedro')]}]
['son', 'son', 'mother', 'brother']