[Marie] brought her son [Allan] and her father [Harold] with her to the local swap-meet to hunt for nice antiques. [Pedro] and his daughter [Heather] went with her grandfather [Harold] to the bowling alley.
('Pedro', 'Allan')
[Pedro] and his daughter [Heather] went with her grandfather [Harold] to the bowling alley. [Marie] brought her son [Allan] and her father [Harold] with her to the local swap-meet to hunt for nice antiques.
[{('Pedro', 'nephew', 'Allan'): [('Pedro', 'sister', 'Marie'), ('Marie', 'son', 'Allan')]}, {('Pedro', 'sister', 'Marie'): [('Pedro', 'father', 'Harold'), ('Harold', 'daughter', 'Marie')]}, {('Pedro', 'father', 'Harold'): [('Pedro', 'daughter', 'Heather'), ('Heather', 'grandfather', 'Harold')]}]
['daughter', 'grandfather', 'daughter', 'son']