in kbc/datasets.py [0:0]
def get_train(self):
copy = np.copy(self.data['train'])
tmp = np.copy(copy[:, 0])
copy[:, 0] = copy[:, 2]
copy[:, 2] = tmp
copy[:, 1] += self.n_predicates // 2 # has been multiplied by two.
return np.vstack((self.data['train'], copy))