[Rebecca] and her brother [Jeffrey] went to the movies together. [Dorothy]'s son, [James], came over to her house for dinner. [Jeffrey], [James]'s brother, came too. [Roberto]'s mother [Dorothy] was present at the thanksgiving service.
('Roberto', 'Rebecca')
[Roberto]'s mother [Dorothy] was present at the thanksgiving service. [Dorothy]'s son, [James], came over to her house for dinner. [Jeffrey], [James]'s brother, came too. [Rebecca] and her brother [Jeffrey] went to the movies together.
[{('Roberto', 'sister', 'Rebecca'): [('Roberto', 'mother', 'Dorothy'), ('Dorothy', 'daughter', 'Rebecca')]}, {('Dorothy', 'daughter', 'Rebecca'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Rebecca')]}, {('Dorothy', 'son', 'Jeffrey'): [('Dorothy', 'son', 'James'), ('James', 'brother', 'Jeffrey')]}]
['mother', 'son', 'brother', 'sister']