code: public static String extractText(Article article) {
  
  		StringBuilder sb = new StringBuilder();
  
  		// extract abstract
  		List<Abstract> abstracts = article.getFront().getArticleMeta()
  				.getAbstract();
  		for (Abstract abstrct : abstracts) {
  			for (Sec sec : abstrct.getSec()) {
  				processTextContent(sec.getAddressOrAlternativesOrArray(), sb,
  						true);
  			}
  		}
  		sb.append('\n');
  
  		// extract text
  		Body body = article.getBody();
  		if (body != null) {
  			for (Sec sec : body.getSec()) {
  
  				Title title = sec.getTitle();
  				if (title != null && title.getContent() != null) {
  					processTextContent(title.getContent(), sb, true);
  					sb.append('\n');
  				}
  				processTextContent(sec.getAddressOrAlternativesOrArray(), sb,
  						false);
  			}
  		}
  		return removeNoise(sb.toString());
  	}
docs: Iterates recursively over all objects of this article, and tries to
  extract its text
  
  @param article
  @return the extracted text from this article