ntain stopwords, like:</p>
<ul>
<li>Vitamin A</li>
<li>Hepatitis A</li>
<li>Web of Science</li>
</ul>
<p>So we decided to add another method (nltk with some grammar definition) to cover most of the cases. To use this, you need to add the parameter <code>keywords_w_stopwords=True</code>, this method is approx 20x slower.</p>

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