[Harold]'s son [Louis] entered rehab for the ninth time at the age of thirty. [Jennifer] did n't enjoy spending time with her aunt [Tracy]. [Louis] asked his daughter, [Karen], why she was crying. [Karen] told him her sister, [Jennifer], had pulled her hair.
('Harold', 'Tracy')
[Harold]'s son [Louis] entered rehab for the ninth time at the age of thirty. [Louis] asked his daughter, [Karen], why she was crying. [Karen] told him her sister, [Jennifer], had pulled her hair. [Jennifer] did n't enjoy spending time with her aunt [Tracy].
[{('Harold', 'daughter', 'Tracy'): [('Harold', 'son', 'Louis'), ('Louis', 'sister', 'Tracy')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'daughter', 'Jennifer'), ('Jennifer', 'aunt', 'Tracy')]}, {('Louis', 'daughter', 'Jennifer'): [('Louis', 'daughter', 'Karen'), ('Karen', 'sister', 'Jennifer')]}]
['son', 'daughter', 'sister', 'aunt']