n-steroidal anti-inflammatory drugs</li>
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<p>We tried some approaches to find those keywords, like ngrams, ngrams + tf-idf, identify entities, among others. But we didn't get really good results.</p>

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<h3 id="Our-approach">Our approach<a class="anchor-link" href="#Our-approach">&#182;</a></h3><p>We found that tokenizing using stopwords + non