[Harold] cares about his son, [Robert]. [Tracy] loves her father, [Harold]. [Shantel] loves to knit with her daughter's son. His name is [Kevin]. [Kevin] loved his mother, [Tracy].
('Robert', 'Shantel')
[Harold] cares about his son, [Robert]. [Tracy] loves her father, [Harold]. [Kevin] loved his mother, [Tracy]. [Shantel] loves to knit with her daughter's son. His name is [Kevin].
[{('Robert', 'mother', 'Shantel'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'mother', 'Shantel')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}, {('Tracy', 'mother', 'Shantel'): [('Tracy', 'son', 'Kevin'), ('Kevin', 'grandmother', 'Shantel')]}]
['father', 'daughter', 'son', 'grandmother']