[Richard]'s sister [Natasha] asked him for some help planting her garden. [Pete]'s wife [Natasha] is going to be the next CEO of the company. [Cindy] picked up her son [Richard] from the mall
('Pete', 'Cindy')
[Pete]'s wife [Natasha] is going to be the next CEO of the company. [Richard]'s sister [Natasha] asked him for some help planting her garden. [Cindy] picked up her son [Richard] from the mall
[{('Pete', 'mother-in-law', 'Cindy'): [('Pete', 'wife', 'Natasha'), ('Natasha', 'mother', 'Cindy')]}, {('Natasha', 'mother', 'Cindy'): [('Natasha', 'brother', 'Richard'), ('Richard', 'mother', 'Cindy')]}]
['wife', 'brother', 'mother']