[Bobby]'s parents, [Hugh] and [David], threw him a surprise party for his birthday. [Hugh]'s daughter [Gloria] made a mental note to be out of town for her birthday!
('David', 'Gloria')
[Bobby]'s parents, [Hugh] and [David], threw him a surprise party for his birthday. [Hugh]'s daughter [Gloria] made a mental note to be out of town for her birthday!
[{('David', 'daughter', 'Gloria'): [('David', 'son', 'Bobby'), ('Bobby', 'sister', 'Gloria')]}, {('Bobby', 'sister', 'Gloria'): [('Bobby', 'father', 'Hugh'), ('Hugh', 'daughter', 'Gloria')]}]
['son', 'father', 'daughter']