[Frances] went to visit her daughter, [David]. While there she spent some time with [David]'s son [Michael]. [Michael]'s father's name is [Hugh].
('Hugh', 'Frances')
[Michael]'s father's name is [Hugh]. [Frances] went to visit her daughter, [David]. While there she spent some time with [David]'s son [Michael].
[{('Hugh', 'mother', 'Frances'): [('Hugh', 'son', 'Michael'), ('Michael', 'grandmother', 'Frances')]}, {('Michael', 'grandmother', 'Frances'): [('Michael', 'mother', 'David'), ('David', 'mother', 'Frances')]}]
['son', 'mother', 'mother']