[Roberto] was playing football with his brother, [Jeffrey]. [Roberto]'s brother, [James], had a broken leg and could only watch. [Pedro] is taking his daughter [Rebecca] out for lunch at her favorite restaurant. [Pedro] is a man with a son named [Jeffrey].
('James', 'Rebecca')
[Roberto] was playing football with his brother, [Jeffrey]. [Roberto]'s brother, [James], had a broken leg and could only watch. [Pedro] is a man with a son named [Jeffrey]. [Pedro] is taking his daughter [Rebecca] out for lunch at her favorite restaurant.
[{('James', 'sister', 'Rebecca'): [('James', 'brother', 'Roberto'), ('Roberto', 'sister', 'Rebecca')]}, {('Roberto', 'sister', 'Rebecca'): [('Roberto', 'father', 'Pedro'), ('Pedro', 'daughter', 'Rebecca')]}, {('Roberto', 'father', 'Pedro'): [('Roberto', 'brother', 'Jeffrey'), ('Jeffrey', 'father', 'Pedro')]}]
['brother', 'brother', 'father', 'daughter']