Update README.md

README.md

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 # CANTEMIST Corpus
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 ## Dataset Description
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 ### Dataset Summary
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 Collection of 1301 oncological clinical case reports written in Spanish, , with tumor morphology mentions annotated and mapped to a controlled terminology, eCIE-O. The training subset contains 501 documents, the development subsets 500, and the test subset 300. 
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 All documents of the corpus have been manually annotated by clinical experts with mentions of tumor morphology (in Spanish, “morfología de neoplasia”). Every tumor morphology mention is linked to an eCIE-O code (the Spanish equivalent of ICD-O).
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 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).
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 For further information, please visit [the official website](https://temu.bsc.es/cantemist/).
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 ## Digital Object Identifier (DOI) and access to dataset files
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 https://zenodo.org/record/3978041
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 ### Supported Tasks
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 Named Entity Recognition
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 ### Languages
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 ES - Spanish
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 ### Directory Structure
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 * README.md
 * cantemist.py
 * TODO
 * TODO
 * TODO
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 ## Dataset Structure
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 ### Data Instances
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 Three four-column files, one for each split.
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 ### Data Fields
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 Every file has 4 columns:
 * 1st column: Word form or punctuation symbol
 * 2nd column: Original BRAT file name
 * 3rd column: Spans
 * 4th column: IOB tag
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 #### Example
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 <pre>
 El                  cc_onco101    662_664    O
 informe             cc_onco101    665_672    O