[Regina] and her sister [Thomas] went to the ice cream shop. [Thomas] ca n't wait to see his grandfather [Roy] later this week.
('Roy', 'Regina')
[Thomas] ca n't wait to see his grandfather [Roy] later this week. [Regina] and her sister [Thomas] went to the ice cream shop.
[{('Roy', 'granddaughter', 'Regina'): [('Roy', 'grandson', 'Thomas'), ('Thomas', 'sister', 'Regina')]}]