[Nancy] has a son called [Kevin]. Each day they go to the park after school. [Nancy] could n't wait to get off the plane to see her mother, [Lorraine].
('Lorraine', 'Kevin')
[Nancy] could n't wait to get off the plane to see her mother, [Lorraine]. [Nancy] has a son called [Kevin]. Each day they go to the park after school.
[{('Lorraine', 'brother', 'Kevin'): [('Lorraine', 'mother', 'Nancy'), ('Nancy', 'son', 'Kevin')]}]
['mother', 'son']