[April] went to her grandmother [Ashley]'s house. [April] asked her sister, [Ann], if she wanted to come too.
('Ann', 'Ashley')
[April] went to her grandmother [Ashley]'s house. [April] asked her sister, [Ann], if she wanted to come too.
[{('Ann', 'grandmother', 'Ashley'): [('Ann', 'sister', 'April'), ('April', 'grandmother', 'Ashley')]}]
['sister', 'grandmother']