[Frances]'s car had a flat tire and she called her daughter, [David], for help. [David] sent her husband, [Hugh], to change the flat tire. [Michael] went to the park with his father, [Hugh].
('Frances', 'Michael')
[Frances]'s car had a flat tire and she called her daughter, [David], for help. [David] sent her husband, [Hugh], to change the flat tire. [Michael] went to the park with his father, [Hugh].
[{('Frances', 'grandson', 'Michael'): [('Frances', 'daughter', 'David'), ('David', 'son', 'Michael')]}, {('David', 'son', 'Michael'): [('David', 'husband', 'Hugh'), ('Hugh', 'son', 'Michael')]}]
['daughter', 'husband', 'son']