[Dennis] has a sister that picks on him. Her name is [Jennifer]. [Dennis] asked his son, [Nicholas], to help paint his house.
('Nicholas', 'Jennifer')
[Dennis] asked his son, [Nicholas], to help paint his house. [Dennis] has a sister that picks on him. Her name is [Jennifer].
[{('Nicholas', 'daughter', 'Jennifer'): [('Nicholas', 'son', 'Dennis'), ('Dennis', 'sister', 'Jennifer')]}]
['son', 'sister']