[Nancy] decided to take her son [Robert] out to have Mexican food for Dinner. [Robert] enjoyed spending time with his mother. [Ashley] could n't wait to get off the plane to see her mother, [Nancy].
('Robert', 'Ashley')
[Nancy] decided to take her son [Robert] out to have Mexican food for Dinner. [Robert] enjoyed spending time with his mother. [Ashley] could n't wait to get off the plane to see her mother, [Nancy].
[{('Robert', 'grandmother', 'Ashley'): [('Robert', 'mother', 'Nancy'), ('Nancy', 'mother', 'Ashley')]}]
['mother', 'mother']