51. The apparatus of claim 49 , wherein the orthographic vector space comprises the vector representation of the out-of-vocabulary word and the orthographic anchors corresponding to in-vocabulary words.
51. The apparatus of claim 49 , wherein the orthographic vector space comprises the vector representation of the out-of-vocabulary word and the orthographic anchors corresponding to in-vocabulary words. 52. The apparatus of claim 51 , wherein the representation of the out-of-vocabulary word and the orthographic anchors are feature vectors.