... higher order word N-grams through the grouping of frequent word successions, Multi-Class N-grams are extended to Multi-Class Composite N-grams 2.1 N-gram Language Models Based on Multiple Word Classes ... the words without are estimated by the same or more accurate models than Multi-Class 3-grams (Multi-Class 3-grams for words , and , and word 3-gram and word 4-gram for words and ) However, for word ... the succeeding class -word 2gram or word 2-gram, while ễ is the same for the preceding one Word Clustering for Multi-Class 2-grams For word clustering in class N-grams, POS information is sometimes...