[Wesley] took is son [Charles] and mother [Frances] out to a lovely summer brunch. [Charles] has an aunt named [David].
('Frances', 'David')
[Wesley] took is son [Charles] and mother [Frances] out to a lovely summer brunch. [Charles] has an aunt named [David].
[{('Frances', 'daughter', 'David'): [('Frances', 'son', 'Wesley'), ('Wesley', 'sister', 'David')]}, {('Wesley', 'sister', 'David'): [('Wesley', 'son', 'Charles'), ('Charles', 'aunt', 'David')]}]
['son', 'son', 'aunt']