[Jerry] spent the entire day playing chess with his grandfather [Clarence]. [April] called her brother, [Jerry], up to see how he was doing after surgery.
('April', 'Clarence')
[April] called her brother, [Jerry], up to see how he was doing after surgery. [Jerry] spent the entire day playing chess with his grandfather [Clarence].
[{('April', 'grandfather', 'Clarence'): [('April', 'brother', 'Jerry'), ('Jerry', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']