[Jennifer] borrowed some money from her brother [Glen]. [Jennifer] took her younger sister [Mary] to the carnival last weekend.
('Mary', 'Glen')
[Jennifer] took her younger sister [Mary] to the carnival last weekend. [Jennifer] borrowed some money from her brother [Glen].
[{('Mary', 'brother', 'Glen'): [('Mary', 'sister', 'Jennifer'), ('Jennifer', 'brother', 'Glen')]}]
['sister', 'brother']