[Allan] and his brother [John] wanted to backpack across Europe together once they graduated college. [Marie] has a son called [Allan]. Each day they go to the park after school. [Robert] took his wife [Marie] out on a date last weekend. [Robert] and his brother [Louis] went to the arcade. They had a wonderful time.
('Louis', 'John')
[Robert] and his brother [Louis] went to the arcade. They had a wonderful time. [Robert] took his wife [Marie] out on a date last weekend. [Marie] has a son called [Allan]. Each day they go to the park after school. [Allan] and his brother [John] wanted to backpack across Europe together once they graduated college.
[{('Louis', 'nephew', 'John'): [('Louis', 'brother', 'Robert'), ('Robert', 'son', 'John')]}, {('Robert', 'son', 'John'): [('Robert', 'wife', 'Marie'), ('Marie', 'son', 'John')]}, {('Marie', 'son', 'John'): [('Marie', 'son', 'Allan'), ('Allan', 'brother', 'John')]}]
['brother', 'wife', 'son', 'brother']