[Beverly] visited her brother [Antonio] in New York. His sister [Marie] was there too. [Dorothy] was sewing a sweater for her sister [Beverly]. [Tracy] was playing hide-and-seek with her sister [Marie].
('Tracy', 'Dorothy')
[Tracy] was playing hide-and-seek with her sister [Marie]. [Beverly] visited her brother [Antonio] in New York. His sister [Marie] was there too. [Dorothy] was sewing a sweater for her sister [Beverly].
[{('Tracy', 'sister', 'Dorothy'): [('Tracy', 'sister', 'Beverly'), ('Beverly', 'sister', 'Dorothy')]}, {('Tracy', 'sister', 'Beverly'): [('Tracy', 'sister', 'Marie'), ('Marie', 'sister', 'Beverly')]}, {('Marie', 'sister', 'Beverly'): [('Marie', 'brother', 'Antonio'), ('Antonio', 'sister', 'Beverly')]}]
['sister', 'brother', 'sister', 'sister']