[John] bought his wife, [Martha], a new necklace. [Martha] takes her son [Brent] to the park every Saturday.
('John', 'Brent')
[John] bought his wife, [Martha], a new necklace. [Martha] takes her son [Brent] to the park every Saturday.
[{('John', 'son', 'Brent'): [('John', 'wife', 'Martha'), ('Martha', 'son', 'Brent')]}]