First, since the facts were automatically collected, they contain errors and thus the system is tested against wrong answers.
essentially, for any text snippet of the form A 1 pA 2 qA 3 , these systems estimate the probability that a relationship r(p, q) holds between entities p and q, given the interstitial context, as 2 the probability of a relationship r(p, q) is the number of times that pattern xA 2 y predicts any relationship r(x, y) in the training set T .