[Ronald] was happy to see his aunt [Tracy]. [Marie] talks to her son [Ronald] every day. [Tracy] is always around her brother [Robert]. [Harold] took her daughter [Marie] for ice cream.
('Harold', 'Robert')
[Harold] took her daughter [Marie] for ice cream. [Marie] talks to her son [Ronald] every day. [Ronald] was happy to see his aunt [Tracy]. [Tracy] is always around her brother [Robert].
[{('Harold', 'son', 'Robert'): [('Harold', 'daughter', 'Tracy'), ('Tracy', 'brother', 'Robert')]}, {('Harold', 'daughter', 'Tracy'): [('Harold', 'daughter', 'Marie'), ('Marie', 'sister', 'Tracy')]}, {('Marie', 'sister', 'Tracy'): [('Marie', 'son', 'Ronald'), ('Ronald', 'aunt', 'Tracy')]}]
['daughter', 'son', 'aunt', 'brother']