[Lillian] took her brother [Dale] to work Monday because his car was in the shop getting a tune up. [Nancy] loves her brother [Dale].
('Nancy', 'Lillian')
[Nancy] loves her brother [Dale]. [Lillian] took her brother [Dale] to work Monday because his car was in the shop getting a tune up.
[{('Nancy', 'sister', 'Lillian'): [('Nancy', 'brother', 'Dale'), ('Dale', 'sister', 'Lillian')]}]
['brother', 'sister']