[Nancy]'s son, [Robert], went away for the weekend. He was going to spend it at his grandmother [Ashley]'s house.
('Nancy', 'Ashley')
[Nancy]'s son, [Robert], went away for the weekend. He was going to spend it at his grandmother [Ashley]'s house.
[{('Nancy', 'mother', 'Ashley'): [('Nancy', 'son', 'Robert'), ('Robert', 'grandmother', 'Ashley')]}]
['son', 'grandmother']