[Jacob]'s sister [Martha] wanted [Jacob]'s daughter, [Alberta], to go with them to the theatre.
('Martha', 'Alberta')
[Jacob]'s sister [Martha] wanted [Jacob]'s daughter, [Alberta], to go with them to the theatre.
[{('Martha', 'niece', 'Alberta'): [('Martha', 'brother', 'Jacob'), ('Jacob', 'daughter', 'Alberta')]}]