[Joshua] took his son [Joseph] to a family reunion. [Joshua] was happy to see his brother [Hugh] and sister [Lena].
('Joseph', 'Hugh')
[Joshua] took his son [Joseph] to a family reunion. [Joshua] was happy to see his brother [Hugh] and sister [Lena].
[{('Joseph', 'uncle', 'Hugh'): [('Joseph', 'father', 'Joshua'), ('Joshua', 'brother', 'Hugh')]}, {('Joshua', 'brother', 'Hugh'): [('Joshua', 'sister', 'Lena'), ('Lena', 'brother', 'Hugh')]}]
['father', 'sister', 'brother']