[Lorraine] saw her sister [Linda] at the grocery store and then went to visit her brother [Jacob] later that evening.
('Jacob', 'Linda')
[Lorraine] saw her sister [Linda] at the grocery store and then went to visit her brother [Jacob] later that evening.
[{('Jacob', 'sister', 'Linda'): [('Jacob', 'sister', 'Lorraine'), ('Lorraine', 'sister', 'Linda')]}]
['sister', 'sister']