[David] and her sister [Cindy] played golf together. [David] won easily. [Hugh] had a great day with his son [Michael]. After a long day of fishing he finally returned home to a beautiful meal cooked by his wife [David].
('Cindy', 'Michael')
[David] and her sister [Cindy] played golf together. [David] won easily. [Hugh] had a great day with his son [Michael]. After a long day of fishing he finally returned home to a beautiful meal cooked by his wife [David].
[{('Cindy', 'nephew', 'Michael'): [('Cindy', 'sister', 'David'), ('David', 'son', 'Michael')]}, {('David', 'son', 'Michael'): [('David', 'husband', 'Hugh'), ('Hugh', 'son', 'Michael')]}]
['sister', 'husband', 'son']