[David] and her sister [Cindy] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while. [Charles] always loved to go to the arcade with his aunt, [Cindy]. [Lena]'s son, [Charles], was busy with school activities and forgot to meet his sister.
('Lena', 'David')
[Lena]'s son, [Charles], was busy with school activities and forgot to meet his sister. [Charles] always loved to go to the arcade with his aunt, [Cindy]. [David] and her sister [Cindy] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while.
[{('Lena', 'sister', 'David'): [('Lena', 'sister', 'Cindy'), ('Cindy', 'sister', 'David')]}, {('Lena', 'sister', 'Cindy'): [('Lena', 'son', 'Charles'), ('Charles', 'aunt', 'Cindy')]}]
['son', 'aunt', 'sister']