[Frances] visited her son [Hugh] at college. [Marie] was ill, that's why she could n't go to school. She was with her mother [Hugh] all day. [Bobby] took his sister [Marie] out to dinner for her birthday.
('Frances', 'Bobby')
[Frances] visited her son [Hugh] at college. [Marie] was ill, that's why she could n't go to school. She was with her mother [Hugh] all day. [Bobby] took his sister [Marie] out to dinner for her birthday.
[{('Frances', 'grandson', 'Bobby'): [('Frances', 'son', 'Hugh'), ('Hugh', 'son', 'Bobby')]}, {('Hugh', 'son', 'Bobby'): [('Hugh', 'daughter', 'Marie'), ('Marie', 'brother', 'Bobby')]}]
['son', 'daughter', 'brother']