[Joshua] is [Dolores]'s father. [Frances] took her son [Joshua] and daughter [David] to the grocery store during her day off.
('David', 'Dolores')
[Frances] took her son [Joshua] and daughter [David] to the grocery store during her day off. [Joshua] is [Dolores]'s father.
[{('David', 'niece', 'Dolores'): [('David', 'brother', 'Joshua'), ('Joshua', 'daughter', 'Dolores')]}, {('David', 'brother', 'Joshua'): [('David', 'mother', 'Frances'), ('Frances', 'son', 'Joshua')]}]
['mother', 'son', 'daughter']