[Lois] picked up her brother [Jacob] from the airport. Then they went to her sister [Constance]'s house for lunch.
('Jacob', 'Constance')
[Lois] picked up her brother [Jacob] from the airport. Then they went to her sister [Constance]'s house for lunch.
[{('Jacob', 'sister', 'Constance'): [('Jacob', 'sister', 'Lois'), ('Lois', 'sister', 'Constance')]}]