[Cindy] and [Hugh] have a brother named [Joshua] [Frances]'s son, [Hugh], was busy with school activities and forgot to meet his sister.
('Frances', 'Joshua')
[Frances]'s son, [Hugh], was busy with school activities and forgot to meet his sister. [Cindy] and [Hugh] have a brother named [Joshua]
[{('Frances', 'son', 'Joshua'): [('Frances', 'daughter', 'Cindy'), ('Cindy', 'brother', 'Joshua')]}, {('Frances', 'daughter', 'Cindy'): [('Frances', 'son', 'Hugh'), ('Hugh', 'sister', 'Cindy')]}]
['son', 'sister', 'brother']