[Wesley] helped his brother, [Joshua], study for the chemistry exam. [James] and his son [Wesley] were going out for lunch. [David] asked her father, [James], if she could come too.
('David', 'Joshua')
[James] and his son [Wesley] were going out for lunch. [David] asked her father, [James], if she could come too. [Wesley] helped his brother, [Joshua], study for the chemistry exam.
[{('David', 'brother', 'Joshua'): [('David', 'brother', 'Wesley'), ('Wesley', 'brother', 'Joshua')]}, {('David', 'brother', 'Wesley'): [('David', 'father', 'James'), ('James', 'son', 'Wesley')]}]
['father', 'son', 'brother']