[Don] was busy planning a 90th birthday party for his aunt, [David]. [Frances] drove her daughter [Lynn] to the hospital. [Lynn]'s son [Don] showed up shortly after.
('Frances', 'David')
[Frances] drove her daughter [Lynn] to the hospital. [Lynn]'s son [Don] showed up shortly after. [Don] was busy planning a 90th birthday party for his aunt, [David].
[{('Frances', 'daughter', 'David'): [('Frances', 'daughter', 'Lynn'), ('Lynn', 'sister', 'David')]}, {('Lynn', 'sister', 'David'): [('Lynn', 'son', 'Don'), ('Don', 'aunt', 'David')]}]
['daughter', 'son', 'aunt']