[Helen] invited her nephew, [Kevin], over for dinner. [Alma] went on a fishing trip with her youngest child, [Kevin], and her brother [John].
('John', 'Helen')
[Alma] went on a fishing trip with her youngest child, [Kevin], and her brother [John]. [Helen] invited her nephew, [Kevin], over for dinner.
[{('John', 'sister', 'Helen'): [('John', 'sister', 'Alma'), ('Alma', 'sister', 'Helen')]}, {('Alma', 'sister', 'Helen'): [('Alma', 'son', 'Kevin'), ('Kevin', 'aunt', 'Helen')]}]