[Emma] is a woman with a sister named [Erika]. [Erika] adores her daughter [Tracy]. [Tracy] loves her very much, too. [Harold] took his son [Robert] to the zoo yesterday because he took his daughter [Tracy] last week
('Robert', 'Emma')
[Harold] took his son [Robert] to the zoo yesterday because he took his daughter [Tracy] last week [Erika] adores her daughter [Tracy]. [Tracy] loves her very much, too. [Emma] is a woman with a sister named [Erika].
[{('Robert', 'niece', 'Emma'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'daughter', 'Emma')]}, {('Tracy', 'daughter', 'Emma'): [('Tracy', 'daughter', 'Erika'), ('Erika', 'sister', 'Emma')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}]
['father', 'daughter', 'daughter', 'sister']