[Cindy] brought her son [Leonard] and her father [James] to the farmer's market. [Leonard] and his sister [Natasha] stood in line at the fair.
('Natasha', 'James')
[Leonard] and his sister [Natasha] stood in line at the fair. [Cindy] brought her son [Leonard] and her father [James] to the farmer's market.
[{('Natasha', 'grandfather', 'James'): [('Natasha', 'brother', 'Leonard'), ('Leonard', 'grandfather', 'James')]}, {('Leonard', 'grandfather', 'James'): [('Leonard', 'mother', 'Cindy'), ('Cindy', 'father', 'James')]}]
['brother', 'mother', 'father']