[Leonard] made his moth [Cindy] a mother's day gift at school. [Natasha] was playing in the sandbox with her brother [Leonard]. [Richard] borrowed some money from his sister [Natasha].
('Richard', 'Cindy')
[Richard] borrowed some money from his sister [Natasha]. [Natasha] was playing in the sandbox with her brother [Leonard]. [Leonard] made his moth [Cindy] a mother's day gift at school.
[{('Richard', 'mother', 'Cindy'): [('Richard', 'brother', 'Leonard'), ('Leonard', 'mother', 'Cindy')]}, {('Richard', 'brother', 'Leonard'): [('Richard', 'sister', 'Natasha'), ('Natasha', 'brother', 'Leonard')]}]
['sister', 'brother', 'mother']