While [Jacob] was at the playground with his young daughter [Alberta], he introduced me to his mom, [Mary].
('Mary', 'Alberta')
While [Jacob] was at the playground with his young daughter [Alberta], he introduced me to his mom, [Mary].
[{('Mary', 'granddaughter', 'Alberta'): [('Mary', 'son', 'Jacob'), ('Jacob', 'daughter', 'Alberta')]}]