[Mary] wanted to see her daughter [Lois] and son [Ernest] so she called them and asked them to come over for dinner.
('Ernest', 'Lois')
[Mary] wanted to see her daughter [Lois] and son [Ernest] so she called them and asked them to come over for dinner.
[{('Ernest', 'sister', 'Lois'): [('Ernest', 'mother', 'Mary'), ('Mary', 'daughter', 'Lois')]}]