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README.md

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 Collection of 1301 oncological clinical case reports written in Spanish, with tumor morphology mentions manually annotated and mapped by clinical experts to a controlled terminology. Every tumor morphology mention is linked to an eCIE-O code (the Spanish equivalent of ICD-O).
 
-The training subset contains 501 documents, the development subsets 500, and the test subset 300.
+The training subset contains 501 documents, the development subsets 500, and the test subset 300. The original dataset is distributed in [Brat](https://brat.nlplab.org/standoff.html) format.
 
 This dataset was designed for the CANcer TExt Mining Shared Task, sponsored by [Plan de Impulso de las Tecnologías del Lenguaje (Plan-TL)](https://plantl.mineco.gob.es/Paginas/index.aspx).