[Lois]'s sister, [Martha], recently started acting. [Mary] and her daughter [Lois] were on vaction.
('Martha', 'Mary')
[Lois]'s sister, [Martha], recently started acting. [Mary] and her daughter [Lois] were on vaction.
[{('Martha', 'mother', 'Mary'): [('Martha', 'sister', 'Lois'), ('Lois', 'mother', 'Mary')]}]