[David] loves to make cookies for her son. His name is [Bobby]. [Lena] could n't wait for her father, [James], to see the gift she bought for him. [Bobby] invited his Aunt [Lena] to come to his graduation party.
('David', 'James')
[David] loves to make cookies for her son. His name is [Bobby]. [Bobby] invited his Aunt [Lena] to come to his graduation party. [Lena] could n't wait for her father, [James], to see the gift she bought for him.
[{('David', 'father', 'James'): [('David', 'sister', 'Lena'), ('Lena', 'father', 'James')]}, {('David', 'sister', 'Lena'): [('David', 'son', 'Bobby'), ('Bobby', 'aunt', 'Lena')]}]
['son', 'aunt', 'father']