[Roberto] and his mother, [Dorothy], drove to the elementary school. [Dorothy]'s daughter, [Rebecca], had finished her first day, and they wanted to pick her up, and see how her day had been. [Roberto] is [James]'s Brother. [Rebecca] gave her grandfather, [Harold], a hug when she saw him.
('James', 'Harold')
[Roberto] is [James]'s Brother. [Roberto] and his mother, [Dorothy], drove to the elementary school. [Dorothy]'s daughter, [Rebecca], had finished her first day, and they wanted to pick her up, and see how her day had been. [Rebecca] gave her grandfather, [Harold], a hug when she saw him.
[{('James', 'grandfather', 'Harold'): [('James', 'mother', 'Dorothy'), ('Dorothy', 'father', 'Harold')]}, {('James', 'mother', 'Dorothy'): [('James', 'brother', 'Roberto'), ('Roberto', 'mother', 'Dorothy')]}, {('Dorothy', 'father', 'Harold'): [('Dorothy', 'daughter', 'Rebecca'), ('Rebecca', 'grandfather', 'Harold')]}]
['brother', 'mother', 'daughter', 'grandfather']