[Tracy] took her son [Bobby] to [Marie] ([Tracy]'s sister) birthday party. [Shantel] took her son, [Louis], to the circus. [Shantel]'s daughter [Marie] was upset that she did not get to go with them.
('Louis', 'Bobby')
[Shantel] took her son, [Louis], to the circus. [Shantel]'s daughter [Marie] was upset that she did not get to go with them. [Tracy] took her son [Bobby] to [Marie] ([Tracy]'s sister) birthday party.
[{('Louis', 'nephew', 'Bobby'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'son', 'Bobby')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'mother', 'Shantel'), ('Shantel', 'daughter', 'Tracy')]}, {('Shantel', 'daughter', 'Tracy'): [('Shantel', 'daughter', 'Marie'), ('Marie', 'sister', 'Tracy')]}]
['mother', 'daughter', 'sister', 'son']