[Frances]'s son, [Francisco], never got along with [Frances]'s other son, [Hugh]. [Francisco] bought his daughter, [Anna], flowers.
('Hugh', 'Anna')
[Frances]'s son, [Francisco], never got along with [Frances]'s other son, [Hugh]. [Francisco] bought his daughter, [Anna], flowers.
[{('Hugh', 'niece', 'Anna'): [('Hugh', 'brother', 'Francisco'), ('Francisco', 'daughter', 'Anna')]}, {('Hugh', 'brother', 'Francisco'): [('Hugh', 'mother', 'Frances'), ('Frances', 'son', 'Francisco')]}]
['mother', 'son', 'daughter']