[Ashley] bought a new video game for her son [George]. [Ashley] has a son called [Nicholas]. Each day they go to the park after school.
('George', 'Nicholas')
[Ashley] bought a new video game for her son [George]. [Ashley] has a son called [Nicholas]. Each day they go to the park after school.
[{('George', 'brother', 'Nicholas'): [('George', 'mother', 'Ashley'), ('Ashley', 'son', 'Nicholas')]}]
['mother', 'son']