[Hugh] and his wife [David] visited his brother [Francisco]. [David] called her son [Michael] to let him know where they went.
('Francisco', 'Michael')
[Hugh] and his wife [David] visited his brother [Francisco]. [David] called her son [Michael] to let him know where they went.
[{('Francisco', 'nephew', 'Michael'): [('Francisco', 'brother', 'Hugh'), ('Hugh', 'son', 'Michael')]}, {('Hugh', 'son', 'Michael'): [('Hugh', 'wife', 'David'), ('David', 'son', 'Michael')]}]
['brother', 'wife', 'son']