[June] gave her brother [Tony] a new sweater for Christmas. [Tony]'s grandfather, [Clarence], was a world war II veteran.
('June', 'Clarence')
[June] gave her brother [Tony] a new sweater for Christmas. [Tony]'s grandfather, [Clarence], was a world war II veteran.
[{('June', 'grandfather', 'Clarence'): [('June', 'brother', 'Tony'), ('Tony', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']