[John] and [Lois] are siblings. [Lois] looks just like her mother, [Mary].
('Mary', 'John')
[John] and [Lois] are siblings. [Lois] looks just like her mother, [Mary].
[{('Mary', 'son', 'John'): [('Mary', 'daughter', 'Lois'), ('Lois', 'brother', 'John')]}]