[Joshua] received a letter in the mail from his sister [Cindy]. When he opened it, he realized the letter was actually for his son [Thomas]. [Lynn]'s daughter Paula went to law school. Paula's brother [Thomas] ended up working in a fast food restaurant.
('Lynn', 'Cindy')
[Lynn]'s daughter Paula went to law school. Paula's brother [Thomas] ended up working in a fast food restaurant. [Joshua] received a letter in the mail from his sister [Cindy]. When he opened it, he realized the letter was actually for his son [Thomas].
[{('Lynn', 'sister', 'Cindy'): [('Lynn', 'son', 'Thomas'), ('Thomas', 'aunt', 'Cindy')]}, {('Thomas', 'aunt', 'Cindy'): [('Thomas', 'father', 'Joshua'), ('Joshua', 'sister', 'Cindy')]}]
['son', 'father', 'sister']