case classLastWord(w: String, offset: Int = 0) extends Feature with Product with Serializable
case classLastWordLength(len: Int, offset: Int = 0) extends Feature with Product with Serializable
case classMarginal(prob: Double, logPartition: Double) extends framework.Marginal with Product with Serializable
case classSentenceDecisionInstance(label: Boolean, features: Array[Feature], id: String) extends Example[Boolean, Array[Feature]] with Product with Serializable