[Dorothy]'s daughter, [Heather], just graduated high school. [Dorothy] went car shopping with her brother [Robert]. [Shantel] received a wonderful hand-written letter from her grandson [Roberto]. [Roberto]'s sister, [Heather], was too lazy to send one though.
('Robert', 'Shantel')
[Dorothy] went car shopping with her brother [Robert]. [Dorothy]'s daughter, [Heather], just graduated high school. [Shantel] received a wonderful hand-written letter from her grandson [Roberto]. [Roberto]'s sister, [Heather], was too lazy to send one though.
[{('Robert', 'mother', 'Shantel'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'mother', 'Shantel')]}, {('Dorothy', 'mother', 'Shantel'): [('Dorothy', 'daughter', 'Heather'), ('Heather', 'grandmother', 'Shantel')]}, {('Heather', 'grandmother', 'Shantel'): [('Heather', 'brother', 'Roberto'), ('Roberto', 'grandmother', 'Shantel')]}]
['sister', 'daughter', 'brother', 'grandmother']