[Robert]'s father's name is [John]. [Constance] called her brother, [John], up to see how he was doing after surgery.
('Constance', 'Robert')
[Constance] called her brother, [John], up to see how he was doing after surgery. [Robert]'s father's name is [John].
[{('Constance', 'nephew', 'Robert'): [('Constance', 'brother', 'John'), ('John', 'son', 'Robert')]}]