[Joshua] watched his son [Thomas] play catch. [Thomas] tossed the ball back and fourth with his brother [Joseph]. [Joseph]'s aunt, [Cindy], bought him a car on valentines
('Joshua', 'Cindy')
[Joshua] watched his son [Thomas] play catch. [Thomas] tossed the ball back and fourth with his brother [Joseph]. [Joseph]'s aunt, [Cindy], bought him a car on valentines
[{('Joshua', 'sister', 'Cindy'): [('Joshua', 'son', 'Joseph'), ('Joseph', 'aunt', 'Cindy')]}, {('Joshua', 'son', 'Joseph'): [('Joshua', 'son', 'Thomas'), ('Thomas', 'brother', 'Joseph')]}]
['son', 'brother', 'aunt']