[Martha] borrowed some money from her brother [Ernest]. [Ernest] and his brother [Herman] went out for lunch. [Ernest] had a burger, and [Herman] had a chicken sandwich.
('Martha', 'Herman')
[Martha] borrowed some money from her brother [Ernest]. [Ernest] and his brother [Herman] went out for lunch. [Ernest] had a burger, and [Herman] had a chicken sandwich.
[{('Martha', 'brother', 'Herman'): [('Martha', 'brother', 'Ernest'), ('Ernest', 'brother', 'Herman')]}]