[Cindy] decided to take her son [Leonard] out to have Mexican food for Dinner. [Leonard] enjoyed spending time with his mother. [Lynn] and her sister [David] went out to lunch with [Lynn]'s sister [Cindy].
('Leonard', 'David')
[Cindy] decided to take her son [Leonard] out to have Mexican food for Dinner. [Leonard] enjoyed spending time with his mother. [Lynn] and her sister [David] went out to lunch with [Lynn]'s sister [Cindy].
[{('Leonard', 'aunt', 'David'): [('Leonard', 'mother', 'Cindy'), ('Cindy', 'sister', 'David')]}, {('Cindy', 'sister', 'David'): [('Cindy', 'sister', 'Lynn'), ('Lynn', 'sister', 'David')]}]
['mother', 'sister', 'sister']