[Marie] went to the lake with her son [Mario] and her father [Harold]. [Harold] was sad that his other daughter [Tracy] could not join them since she was out of town. [Louis] invited his nephew, [Mario] to the baseball game.
('Tracy', 'Louis')
[Marie] went to the lake with her son [Mario] and her father [Harold]. [Harold] was sad that his other daughter [Tracy] could not join them since she was out of town. [Louis] invited his nephew, [Mario] to the baseball game.
[{('Tracy', 'brother', 'Louis'): [('Tracy', 'sister', 'Marie'), ('Marie', 'brother', 'Louis')]}, {('Tracy', 'sister', 'Marie'): [('Tracy', 'father', 'Harold'), ('Harold', 'daughter', 'Marie')]}, {('Marie', 'brother', 'Louis'): [('Marie', 'son', 'Mario'), ('Mario', 'uncle', 'Louis')]}]
['father', 'daughter', 'son', 'uncle']