[Helen] and her sister [Alma] were having lunch with their mother [Latisha]. [Latisha] also invited her son [Rich] to join them for lunch.
('Helen', 'Rich')
[Helen] and her sister [Alma] were having lunch with their mother [Latisha]. [Latisha] also invited her son [Rich] to join them for lunch.
[{('Helen', 'brother', 'Rich'): [('Helen', 'sister', 'Alma'), ('Alma', 'brother', 'Rich')]}, {('Alma', 'brother', 'Rich'): [('Alma', 'mother', 'Latisha'), ('Latisha', 'son', 'Rich')]}]