[Allan] is a sibling of [Ronald]. [Marie]'s son, [Allan], invited her brothers, [Pedro] and [Louis], to a surprise party.
('Louis', 'Ronald')
[Marie]'s son, [Allan], invited her brothers, [Pedro] and [Louis], to a surprise party. [Allan] is a sibling of [Ronald].
[{('Louis', 'nephew', 'Ronald'): [('Louis', 'sister', 'Marie'), ('Marie', 'son', 'Ronald')]}, {('Marie', 'son', 'Ronald'): [('Marie', 'son', 'Allan'), ('Allan', 'brother', 'Ronald')]}, {('Louis', 'sister', 'Marie'): [('Louis', 'brother', 'Pedro'), ('Pedro', 'sister', 'Marie')]}]
['brother', 'sister', 'son', 'brother']