[Cindy] and her sister [Lena] are planning a surprise birthday party for [James], [Lena]'s father. [Leonard] asked his mother [Cindy] where babies came from. [Cindy] told him they came from the stork.
('Leonard', 'James')
[Leonard] asked his mother [Cindy] where babies came from. [Cindy] told him they came from the stork. [Cindy] and her sister [Lena] are planning a surprise birthday party for [James], [Lena]'s father.
[{('Leonard', 'grandfather', 'James'): [('Leonard', 'mother', 'Cindy'), ('Cindy', 'father', 'James')]}, {('Cindy', 'father', 'James'): [('Cindy', 'sister', 'Lena'), ('Lena', 'father', 'James')]}]
['mother', 'sister', 'father']