[Lillian] asked her brother, [Dale], what he was doing this weekend. [Dale] told her he was spending it with his brother [Nicholas].
('Lillian', 'Nicholas')
[Lillian] asked her brother, [Dale], what he was doing this weekend. [Dale] told her he was spending it with his brother [Nicholas].
[{('Lillian', 'brother', 'Nicholas'): [('Lillian', 'brother', 'Dale'), ('Dale', 'brother', 'Nicholas')]}]
['brother', 'brother']