[Nicholas] and [George] were twin brothers. [George] never married, but [Nicholas] did and had a daughter, [Jennifer]
('George', 'Jennifer')
[Nicholas] and [George] were twin brothers. [George] never married, but [Nicholas] did and had a daughter, [Jennifer]
[{('George', 'niece', 'Jennifer'): [('George', 'brother', 'Nicholas'), ('Nicholas', 'daughter', 'Jennifer')]}]
['brother', 'daughter']