[Francisco] is an engineer who loves to take his son [Leonard] to the science museum to help him learn about the world [Francisco] is making a very special present for his wife [Cindy]. [Cindy] took her younger sister [David] to the carnival last weekend.
('David', 'Leonard')
[Cindy] took her younger sister [David] to the carnival last weekend. [Francisco] is making a very special present for his wife [Cindy]. [Francisco] is an engineer who loves to take his son [Leonard] to the science museum to help him learn about the world
[{('David', 'nephew', 'Leonard'): [('David', 'sister', 'Cindy'), ('Cindy', 'son', 'Leonard')]}, {('Cindy', 'son', 'Leonard'): [('Cindy', 'husband', 'Francisco'), ('Francisco', 'son', 'Leonard')]}]
['sister', 'husband', 'son']