[George] called his son [Jerry] to tell him he saw [Janet], [Jerry]'s wife, at the market today.
('Janet', 'George')
[George] called his son [Jerry] to tell him he saw [Janet], [Jerry]'s wife, at the market today.
[{('Janet', 'father-in-law', 'George'): [('Janet', 'husband', 'Jerry'), ('Jerry', 'father', 'George')]}]
['husband', 'father']