[John]'s son [Allan] and sister [Helen] went camping together last weekend. [Rich] called his nephew [Allan] and they made plans to go to a football game this weekend.
('Helen', 'Rich')
[John]'s son [Allan] and sister [Helen] went camping together last weekend. [Rich] called his nephew [Allan] and they made plans to go to a football game this weekend.
[{('Helen', 'brother', 'Rich'): [('Helen', 'brother', 'John'), ('John', 'brother', 'Rich')]}, {('John', 'brother', 'Rich'): [('John', 'son', 'Allan'), ('Allan', 'uncle', 'Rich')]}]