[Brandon] went to the lake with his brother [Bobby] and his mother [David]. [David] wanted her husband [Hugh] to join them, but he had to go to work instead.
('Hugh', 'Bobby')
[Brandon] went to the lake with his brother [Bobby] and his mother [David]. [David] wanted her husband [Hugh] to join them, but he had to go to work instead.
[{('Hugh', 'son', 'Bobby'): [('Hugh', 'wife', 'David'), ('David', 'son', 'Bobby')]}, {('David', 'son', 'Bobby'): [('David', 'son', 'Brandon'), ('Brandon', 'brother', 'Bobby')]}]
['wife', 'son', 'brother']