[Robert] and his brother [Louis] watch [Robert]'s daughter [Michelle] in her school play. [Harold] met his son [Louis] for dinner. Unfortunately [Harold]'s son [Antonio] could not attend.
('Antonio', 'Michelle')
[Harold] met his son [Louis] for dinner. Unfortunately [Harold]'s son [Antonio] could not attend. [Robert] and his brother [Louis] watch [Robert]'s daughter [Michelle] in her school play.
[{('Antonio', 'niece', 'Michelle'): [('Antonio', 'brother', 'Robert'), ('Robert', 'daughter', 'Michelle')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Louis'): [('Antonio', 'father', 'Harold'), ('Harold', 'son', 'Louis')]}]
['father', 'son', 'brother', 'daughter']