[Cindy] and her two sisters, [Lena] and [David], went to visit [Cindy]'s brother [Joshua] in Ohio last weekend and had a good time.
('Joshua', 'Lena')
[Cindy] and her two sisters, [Lena] and [David], went to visit [Cindy]'s brother [Joshua] in Ohio last weekend and had a good time.
[{('Joshua', 'sister', 'Lena'): [('Joshua', 'sister', 'Cindy'), ('Cindy', 'sister', 'Lena')]}, {('Joshua', 'sister', 'Cindy'): [('Joshua', 'sister', 'David'), ('David', 'sister', 'Cindy')]}]
['sister', 'sister', 'sister']