[James]'s daughter, [Lynn], was busy caring for her son, [Clarence], and could n't take his call. [James] was upset at his daughter [David] for staying out so late.
('David', 'Clarence')
[James] was upset at his daughter [David] for staying out so late. [James]'s daughter, [Lynn], was busy caring for her son, [Clarence], and could n't take his call.
[{('David', 'nephew', 'Clarence'): [('David', 'sister', 'Lynn'), ('Lynn', 'son', 'Clarence')]}, {('David', 'sister', 'Lynn'): [('David', 'father', 'James'), ('James', 'daughter', 'Lynn')]}]
['father', 'daughter', 'son']