[Michael] and his brother [David] are very close. [David] does not get along well with his sister [Marjorie].
('Michael', 'Marjorie')
[Michael] and his brother [David] are very close. [David] does not get along well with his sister [Marjorie].
[{('Michael', 'sister', 'Marjorie'): [('Michael', 'brother', 'David'), ('David', 'sister', 'Marjorie')]}]