[David] talks to her sister, [Cindy], a couple times a day. [Cindy]'s brother, [Wesley], only talks to her once a year. [Wesley]'s mother, [Frances], just got her citizenship.
('David', 'Frances')
[David] talks to her sister, [Cindy], a couple times a day. [Cindy]'s brother, [Wesley], only talks to her once a year. [Wesley]'s mother, [Frances], just got her citizenship.
[{('David', 'mother', 'Frances'): [('David', 'sister', 'Cindy'), ('Cindy', 'mother', 'Frances')]}, {('Cindy', 'mother', 'Frances'): [('Cindy', 'brother', 'Wesley'), ('Wesley', 'mother', 'Frances')]}]
['sister', 'brother', 'mother']