[Jacob] often goes out for lunch with his sister, [Lois]. [Lois] was playing hide-and-seek with her sister [Constance].
('Jacob', 'Constance')
[Jacob] often goes out for lunch with his sister, [Lois]. [Lois] was playing hide-and-seek with her sister [Constance].
[{('Jacob', 'sister', 'Constance'): [('Jacob', 'sister', 'Lois'), ('Lois', 'sister', 'Constance')]}]