[Jerry] and his sister [Andrea] love to play video games. [Lillian] was so proud of her daughter [Andrea] for getting straight A's this semester.
('Jerry', 'Lillian')
[Jerry] and his sister [Andrea] love to play video games. [Lillian] was so proud of her daughter [Andrea] for getting straight A's this semester.
[{('Jerry', 'mother', 'Lillian'): [('Jerry', 'sister', 'Andrea'), ('Andrea', 'mother', 'Lillian')]}]
['sister', 'mother']