[Andrea] was playing in the sandbox with her brother [Jerry]. [Andrea] and her mother [Lillian] went dress shopping on Saturday.
('Lillian', 'Jerry')
[Andrea] and her mother [Lillian] went dress shopping on Saturday. [Andrea] was playing in the sandbox with her brother [Jerry].
[{('Lillian', 'son', 'Jerry'): [('Lillian', 'daughter', 'Andrea'), ('Andrea', 'brother', 'Jerry')]}]
['daughter', 'brother']