[Louise] and her sister [Kevin] went to the ice cream shop. [Lorraine] was playing in the sandbox with her brother [Kevin].
('Lorraine', 'Louise')
[Lorraine] was playing in the sandbox with her brother [Kevin]. [Louise] and her sister [Kevin] went to the ice cream shop.
[{('Lorraine', 'sister', 'Louise'): [('Lorraine', 'brother', 'Kevin'), ('Kevin', 'sister', 'Louise')]}]
['brother', 'sister']