[Mary] brought her daughter [Martha] a cake. [Martha]'s daughter [Laura] wanted to eat the cake.
('Laura', 'Mary')
[Mary] brought her daughter [Martha] a cake. [Martha]'s daughter [Laura] wanted to eat the cake.
[{('Laura', 'grandmother', 'Mary'): [('Laura', 'mother', 'Martha'), ('Martha', 'mother', 'Mary')]}]