[Ann] ca n't wait to see her grandfather [Clarence]. [Ann] was sewing a sweater for her sister [April].
('April', 'Clarence')
[Ann] was sewing a sweater for her sister [April]. [Ann] ca n't wait to see her grandfather [Clarence].
[{('April', 'grandfather', 'Clarence'): [('April', 'sister', 'Ann'), ('Ann', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']