[Dale] taught his daughter, [June], how to ride a bike. [Travis] went to the park with his father, [Dale].
('June', 'Travis')
[Dale] taught his daughter, [June], how to ride a bike. [Travis] went to the park with his father, [Dale].
[{('June', 'brother', 'Travis'): [('June', 'father', 'Dale'), ('Dale', 'son', 'Travis')]}]
['father', 'son']