[Johnson] and his brother [Brandon] are fighting again. [David] takes her son [Brandon] to the park every Saturday. [Frances] was busy planning her grandson's, [Johnson], birthday party.
('David', 'Frances')
[David] takes her son [Brandon] to the park every Saturday. [Johnson] and his brother [Brandon] are fighting again. [Frances] was busy planning her grandson's, [Johnson], birthday party.
[{('David', 'mother', 'Frances'): [('David', 'son', 'Brandon'), ('Brandon', 'grandmother', 'Frances')]}, {('Brandon', 'grandmother', 'Frances'): [('Brandon', 'brother', 'Johnson'), ('Johnson', 'grandmother', 'Frances')]}]
['son', 'brother', 'grandmother']