[Dale] took his son [Nicolas] for boxing lessons. He felt the boy needed to toughen up. [June] could n't wait for the surprise birthday party that she was throwing for her brother [Nicolas] next weekend.
('Dale', 'June')
[Dale] took his son [Nicolas] for boxing lessons. He felt the boy needed to toughen up. [June] could n't wait for the surprise birthday party that she was throwing for her brother [Nicolas] next weekend.
[{('Dale', 'daughter', 'June'): [('Dale', 'son', 'Nicolas'), ('Nicolas', 'sister', 'June')]}]
['son', 'sister']