[David] went shopping with her son [Michael] and her brother [Francisco]. [Michael]'s aunt, [Lynn], bought him a smart watch.
('Francisco', 'Lynn')
[David] went shopping with her son [Michael] and her brother [Francisco]. [Michael]'s aunt, [Lynn], bought him a smart watch.
[{('Francisco', 'sister', 'Lynn'): [('Francisco', 'sister', 'David'), ('David', 'sister', 'Lynn')]}, {('David', 'sister', 'Lynn'): [('David', 'son', 'Michael'), ('Michael', 'aunt', 'Lynn')]}]
['sister', 'son', 'aunt']