dist/multilabel/MulticlassSegmentation.js
function(segment, explain) {
		var sample = this.sampleToFeatures(segment, this.featureExtractor);
		return this.multiclassClassifier.classify(sample, explain);
	}
function(segment, explain) {
		var sample = this.sampleToFeatures(segment, this.featureExtractor);
		return this.multiclassClassifier.classify(sample, explain);
	}
Internal function - use the model trained so far to classify a single segment of a sentence.

@param segment a part of a text sentence.
@param explain - int - if positive, an "explanation" field, with the given length, will be added to the result.

@return {category: xxx, probability: yyy}