[Martha] needed to go to the store. [Martha] asked her sister [Stephanie] for a ride. [Alberta] was celebrating her birthday with her mother [Stephanie].
('Alberta', 'Martha')
[Alberta] was celebrating her birthday with her mother [Stephanie]. [Martha] needed to go to the store. [Martha] asked her sister [Stephanie] for a ride.
[{('Alberta', 'aunt', 'Martha'): [('Alberta', 'mother', 'Stephanie'), ('Stephanie', 'sister', 'Martha')]}]