[Harold] had a great meal with his son [Robert] and daughter [Marie] [Robert] and [Louis], both brothers, like to go to the ball game with [Louis]'s son, [Paul].
('Paul', 'Marie')
[Robert] and [Louis], both brothers, like to go to the ball game with [Louis]'s son, [Paul]. [Harold] had a great meal with his son [Robert] and daughter [Marie]
[{('Paul', 'aunt', 'Marie'): [('Paul', 'father', 'Louis'), ('Louis', 'sister', 'Marie')]}, {('Louis', 'sister', 'Marie'): [('Louis', 'father', 'Harold'), ('Harold', 'daughter', 'Marie')]}, {('Louis', 'father', 'Harold'): [('Louis', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}]
['father', 'brother', 'father', 'daughter']