[Bobby]'s father [Hugh] and sister [Evangeline] went out to dinner with [Hugh]'s wife, [David].
('David', 'Evangeline')
[Bobby]'s father [Hugh] and sister [Evangeline] went out to dinner with [Hugh]'s wife, [David].
[{('David', 'daughter', 'Evangeline'): [('David', 'husband', 'Hugh'), ('Hugh', 'daughter', 'Evangeline')]}, {('Hugh', 'daughter', 'Evangeline'): [('Hugh', 'son', 'Bobby'), ('Bobby', 'sister', 'Evangeline')]}]
['husband', 'son', 'sister']