[Joseph] and his brother [Don], as well as [Don]'s grandmother [Frances] and [Joshua]'s son [Joseph] went to see a movie together today.
('Joshua', 'Frances')
[Joseph] and his brother [Don], as well as [Don]'s grandmother [Frances] and [Joshua]'s son [Joseph] went to see a movie together today.
[{('Joshua', 'mother', 'Frances'): [('Joshua', 'son', 'Don'), ('Don', 'grandmother', 'Frances')]}, {('Joshua', 'son', 'Don'): [('Joshua', 'son', 'Joseph'), ('Joseph', 'brother', 'Don')]}]
['son', 'brother', 'grandmother']