[Hugh] met his son [Michael] for dinner. Unfortunately [Hugh]'s son [Bobby] could not attend. [Bobby] is [Johnson]'s Brother.
('Johnson', 'Michael')
[Bobby] is [Johnson]'s Brother. [Hugh] met his son [Michael] for dinner. Unfortunately [Hugh]'s son [Bobby] could not attend.
[{('Johnson', 'brother', 'Michael'): [('Johnson', 'brother', 'Bobby'), ('Bobby', 'brother', 'Michael')]}, {('Bobby', 'brother', 'Michael'): [('Bobby', 'father', 'Hugh'), ('Hugh', 'son', 'Michael')]}]
['brother', 'father', 'son']