To reduce the number of false negative examples, we propose a new method to construct negative examples by utilizing the 1-to-1/1-to-n/n-to-1/n-to-n property of a relation.
1-to-1/n-to-1/1-to-n Relation A 1-to-1 or n-to-1 relation is a functional relation: for a relation r, for each valid source entity e 1 , there is only one unique destination entity e 2 such that (e 1 , e 2 ) ∈ r. in a real KB like Freebase, very few relations meet the exact criterion.