Update README.md

README.md

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 A dataset for extracting or generating keywords for scientific texts in Russian. It contains annotations of scientific articles from four domains: mathematics and computer science (a fragment of the Keyphrases CS&Math Russian dataset), history, linguistics, and medicine. For more details about the dataset please refer the original paper: https://arxiv.org/abs/2409.10640
 
-## Dataset Structure
+## Dataset Structure
+
+<ul>
+  <li>abstract</li>, an abstract in a string form
+  <li>keywords</li>, a list of keyphrases provided by the authors of the paper
+</ul>