[Mary] was honored to take her son [Ernest] to the mother son dance at her son's school last Friday. [Lois] and her mother [Mary] attended a play at the theater.
('Ernest', 'Lois')
[Mary] was honored to take her son [Ernest] to the mother son dance at her son's school last Friday. [Lois] and her mother [Mary] attended a play at the theater.
[{('Ernest', 'sister', 'Lois'): [('Ernest', 'mother', 'Mary'), ('Mary', 'daughter', 'Lois')]}]