/extract_topics.html"><strong aria-hidden="true">20.</strong> extract_topics</a></li><li class="chapter-item expanded "><a href="../cli/invert.html"><strong aria-hidden="true">21.</strong> invert</a></li><li class="chapter-item expanded "><a href="../cli/kth_threshold.html"><strong aria-hidden="true">22.</strong> kth_threshold</a></li><li class="chapter-item expanded "><a href="../cli/lexicon.html"><strong aria-hidden="true">23.</strong> lexicon</a></li><li class="chapter-item expanded "><a href="../cli/map