code: func (p *Tagger) Clone() *Tagger {
  	return &Tagger{
  		Model:  p.Model,
  		corpus: p.corpus,
  
  		Output: make(chan lingo.AnnotatedSentence),
  
  		sentences: make(chan lingo.AnnotatedSentence),
  
  		Lemmatizer: p.Lemmatizer,
  		Stemmer:    p.Stemmer,
  		clusters:   p.clusters,
  	}
  }
docs: // Clone() makes a copy of a POSTagger