[Dale] asked his son, [Travis], to go grocery shopping for him. [Travis] was busy and sent his wife, [Belva], instead.
('Dale', 'Belva')
[Dale] asked his son, [Travis], to go grocery shopping for him. [Travis] was busy and sent his wife, [Belva], instead.
[{('Dale', 'daughter-in-law', 'Belva'): [('Dale', 'son', 'Travis'), ('Travis', 'wife', 'Belva')]}]
['son', 'wife']