[Kevin]'s sister, [Heidi], did n't know how deal with drama at work. She asked her sister, [Lorraine] for advice
('Kevin', 'Heidi')
[Kevin]'s sister, [Heidi], did n't know how deal with drama at work. She asked her sister, [Lorraine] for advice
[{('Kevin', 'sister', 'Heidi'): [('Kevin', 'sister', 'Lorraine'), ('Lorraine', 'sister', 'Heidi')]}]
['sister', 'sister']