[David] and her mother [Frances] attended a play at the theater. [David] has been waiting around all day for her son, [Bobby]. [Bobby] and his sister [Gloria] love to play video games.
('Frances', 'Gloria')
[David] and her mother [Frances] attended a play at the theater. [David] has been waiting around all day for her son, [Bobby]. [Bobby] and his sister [Gloria] love to play video games.
[{('Frances', 'granddaughter', 'Gloria'): [('Frances', 'daughter', 'David'), ('David', 'daughter', 'Gloria')]}, {('David', 'daughter', 'Gloria'): [('David', 'son', 'Bobby'), ('Bobby', 'sister', 'Gloria')]}]
['daughter', 'son', 'sister']