[Dorothy] is one of my favorite students. She is the younger sister of [Louis], who I taught last year, [Dorothy] told her daughter [Rebecca] to wash up. Dinner was ready. [Tracy] was trying to tell her father [Harold] that she needed help in the kitchen. [Harold] did n't hear her because he was busy playing baseball with his son [Louis].
('Tracy', 'Rebecca')
[Tracy] was trying to tell her father [Harold] that she needed help in the kitchen. [Harold] did n't hear her because he was busy playing baseball with his son [Louis]. [Dorothy] is one of my favorite students. She is the younger sister of [Louis], who I taught last year, [Dorothy] told her daughter [Rebecca] to wash up. Dinner was ready.
[{('Tracy', 'niece', 'Rebecca'): [('Tracy', 'sister', 'Dorothy'), ('Dorothy', 'daughter', 'Rebecca')]}, {('Tracy', 'sister', 'Dorothy'): [('Tracy', 'father', 'Harold'), ('Harold', 'daughter', 'Dorothy')]}, {('Harold', 'daughter', 'Dorothy'): [('Harold', 'son', 'Louis'), ('Louis', 'sister', 'Dorothy')]}]
['father', 'son', 'sister', 'daughter']