Language Modeling: Many morphs rarely appear in a general news corpus (e.g., "六 步 郎 (Six Step Man)" refers to the NBA baseketball player "勒布朗•詹姆斯 (Lebron James)".).
we use the character-based language models trained from Gigaword to calculate the occurrence probabilities of each term, and use n-gram probabilities (n ∈ [1 : 5]) as features.