[Louise] and [Lorraine] are sisters who have one brother named [Kevin].
('Lorraine', 'Louise')
[Louise] and [Lorraine] are sisters who have one brother named [Kevin].
[{('Lorraine', 'sister', 'Louise'): [('Lorraine', 'brother', 'Kevin'), ('Kevin', 'sister', 'Louise')]}]
['brother', 'sister']