[Clarence] was invited to his Aunt [David]'s wedding next Spring. [Joshua] and his sister [Cindy] went out to eat. They went to Burger Town because [Joshua]'s son [Clarence] worked there.
('Cindy', 'David')
[Joshua] and his sister [Cindy] went out to eat. They went to Burger Town because [Joshua]'s son [Clarence] worked there. [Clarence] was invited to his Aunt [David]'s wedding next Spring.
[{('Cindy', 'sister', 'David'): [('Cindy', 'brother', 'Joshua'), ('Joshua', 'sister', 'David')]}, {('Joshua', 'sister', 'David'): [('Joshua', 'son', 'Clarence'), ('Clarence', 'aunt', 'David')]}]
['brother', 'son', 'aunt']