[Dorothy] looked all over the house for her son [James], but could n't find him. That's because [James] was outside in the back yard, playing baseball with his brother [Roberto]. [James] likes playing catch with his sister [Rebecca], but his brother [Roberto] never wants to play.
('Rebecca', 'Dorothy')
[James] likes playing catch with his sister [Rebecca], but his brother [Roberto] never wants to play. [Dorothy] looked all over the house for her son [James], but could n't find him. That's because [James] was outside in the back yard, playing baseball with his brother [Roberto].
[{('Rebecca', 'mother', 'Dorothy'): [('Rebecca', 'brother', 'Roberto'), ('Roberto', 'mother', 'Dorothy')]}, {('Roberto', 'mother', 'Dorothy'): [('Roberto', 'brother', 'James'), ('James', 'mother', 'Dorothy')]}, {('Rebecca', 'brother', 'Roberto'): [('Rebecca', 'brother', 'James'), ('James', 'brother', 'Roberto')]}]
['brother', 'brother', 'brother', 'mother']