[Lorraine]'s sister, [Heidi], recently started acting. [Kevin] and her sister [Lorraine] decided to take a trip to Mexico together.
('Heidi', 'Kevin')
[Lorraine]'s sister, [Heidi], recently started acting. [Kevin] and her sister [Lorraine] decided to take a trip to Mexico together.
[{('Heidi', 'brother', 'Kevin'): [('Heidi', 'sister', 'Lorraine'), ('Lorraine', 'brother', 'Kevin')]}]
['sister', 'brother']