[Clarence] is a man with a grandson named [Jeff]. [Jeff] took his sister [Lorraine] out to dinner for her birthday.
('Lorraine', 'Clarence')
[Jeff] took his sister [Lorraine] out to dinner for her birthday. [Clarence] is a man with a grandson named [Jeff].
[{('Lorraine', 'grandfather', 'Clarence'): [('Lorraine', 'brother', 'Jeff'), ('Jeff', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']