[Constance] has a son named [Thomas]. [Jacob] took his nephew [Thomas] to the park to play with his friends.
('Constance', 'Jacob')
[Constance] has a son named [Thomas]. [Jacob] took his nephew [Thomas] to the park to play with his friends.
[{('Constance', 'brother', 'Jacob'): [('Constance', 'son', 'Thomas'), ('Thomas', 'uncle', 'Jacob')]}]