[Pete] called his mother, [Cindy], to tell her the good news of his engagement. [Lena] asked her sister [Cindy] to hurry up and get off the phone. [Lena]'s sister [David] told her to wait her turn and be more patient.
('Pete', 'David')
[Pete] called his mother, [Cindy], to tell her the good news of his engagement. [Lena] asked her sister [Cindy] to hurry up and get off the phone. [Lena]'s sister [David] told her to wait her turn and be more patient.
[{('Pete', 'aunt', 'David'): [('Pete', 'mother', 'Cindy'), ('Cindy', 'sister', 'David')]}, {('Cindy', 'sister', 'David'): [('Cindy', 'sister', 'Lena'), ('Lena', 'sister', 'David')]}]
['mother', 'sister', 'sister']