[June] borrowed some money from her brother [Nicolas]. [Nicolas] helped his brother, [Tony], study for the chemistry exam.
('June', 'Tony')
[June] borrowed some money from her brother [Nicolas]. [Nicolas] helped his brother, [Tony], study for the chemistry exam.
[{('June', 'brother', 'Tony'): [('June', 'brother', 'Nicolas'), ('Nicolas', 'brother', 'Tony')]}]
['brother', 'brother']