[John] enjoys talking to his sister and her son. Her son is [Fernando]. [Constance] has a son called [Fernando]. Each day they go to the park after school.
('Constance', 'John')
[Constance] has a son called [Fernando]. Each day they go to the park after school. [John] enjoys talking to his sister and her son. Her son is [Fernando].
[{('Constance', 'brother', 'John'): [('Constance', 'son', 'Fernando'), ('Fernando', 'uncle', 'John')]}]