[Cindy] took her nephew [Michael] to the park to play soccer. [David] and her son [Michael] went to the zoo and then out to dinner yesterday. [Frances] and her daughter [Cindy] were on vaction.
('David', 'Frances')
[David] and her son [Michael] went to the zoo and then out to dinner yesterday. [Cindy] took her nephew [Michael] to the park to play soccer. [Frances] and her daughter [Cindy] were on vaction.
[{('David', 'mother', 'Frances'): [('David', 'sister', 'Cindy'), ('Cindy', 'mother', 'Frances')]}, {('David', 'sister', 'Cindy'): [('David', 'son', 'Michael'), ('Michael', 'aunt', 'Cindy')]}]
['son', 'aunt', 'mother']