[Belva]'s husband, [Travis], took his dad, [Dale], fishing.
('Belva', 'Dale')
[Belva]'s husband, [Travis], took his dad, [Dale], fishing.
[{('Belva', 'father-in-law', 'Dale'): [('Belva', 'husband', 'Travis'), ('Travis', 'father', 'Dale')]}]
['husband', 'father']