[Marie]'s son, [John], was busy with school activities and forgot to meet his sister. [Louis] asked his sister [Tracy] to help him with his math homework. [Tracy] was n't sure what to do, so she asked her sister [Dorothy] for some help. [Dorothy] went with her nephew [John] to pick out a pet puppy for his birthday.
('Marie', 'Louis')
[Marie]'s son, [John], was busy with school activities and forgot to meet his sister. [Dorothy] went with her nephew [John] to pick out a pet puppy for his birthday. [Louis] asked his sister [Tracy] to help him with his math homework. [Tracy] was n't sure what to do, so she asked her sister [Dorothy] for some help.
[{('Marie', 'brother', 'Louis'): [('Marie', 'sister', 'Tracy'), ('Tracy', 'brother', 'Louis')]}, {('Marie', 'sister', 'Tracy'): [('Marie', 'sister', 'Dorothy'), ('Dorothy', 'sister', 'Tracy')]}, {('Marie', 'sister', 'Dorothy'): [('Marie', 'son', 'John'), ('John', 'aunt', 'Dorothy')]}]
['son', 'aunt', 'sister', 'brother']