[William] was happy to see his aunt [Constance]. [Stephanie] likes taking her son [William] to school.
('Stephanie', 'Constance')
[Stephanie] likes taking her son [William] to school. [William] was happy to see his aunt [Constance].
[{('Stephanie', 'sister', 'Constance'): [('Stephanie', 'son', 'William'), ('William', 'aunt', 'Constance')]}]