[Thomas] went on a camping trip with his father [Joshua] and grandfather [James] last weekend. [David] borrowed some money from her brother [Joshua].
('David', 'James')
[David] borrowed some money from her brother [Joshua]. [Thomas] went on a camping trip with his father [Joshua] and grandfather [James] last weekend.
[{('David', 'father', 'James'): [('David', 'brother', 'Joshua'), ('Joshua', 'father', 'James')]}, {('Joshua', 'father', 'James'): [('Joshua', 'son', 'Thomas'), ('Thomas', 'grandfather', 'James')]}]
['brother', 'son', 'grandfather']