[Cindy] took her son [Leonard] shopping for new school clothes. They had a good time. [David] called [Cindy], her sister, to see if she wanted to go out to eat. [David] called her brother, [Joshua], up to see how he was doing after surgery.
('Leonard', 'Joshua')
[Cindy] took her son [Leonard] shopping for new school clothes. They had a good time. [David] called [Cindy], her sister, to see if she wanted to go out to eat. [David] called her brother, [Joshua], up to see how he was doing after surgery.
[{('Leonard', 'uncle', 'Joshua'): [('Leonard', 'mother', 'Cindy'), ('Cindy', 'brother', 'Joshua')]}, {('Cindy', 'brother', 'Joshua'): [('Cindy', 'sister', 'David'), ('David', 'brother', 'Joshua')]}]
['mother', 'sister', 'brother']