add readme to dataset card

README.md

@@ -37,4 +37,51 @@ configs:
     path: data/selective-*
   - split: total
     path: data/total-*
+license: mit
+task_categories:
+- token-classification
+language:
+- pt
 ---
+
+# Segundo HAREM
+
+According to [Linguateca](https://www.linguateca.pt/) - a repository for Natural Language resources in Portuguese - HAREM is a "joint evaluation in the area of Named Entity Recognition in Portuguese".
+
+The sole goal of this dataset is to make [Segundo HAREM](https://www.linguateca.pt/HAREM/) generally available through the huggingface hub and the datasets library.
+
+Intended use: this dataset may be used to train and/or evaluate Named Entity Recognition models in Portuguese.
+
+The script used to convert the original xml file containing the annotations of Segundo HAREM to json, and subsequently to json, was derived from [this fork](https://github.com/fabiocapsouza/harem_preprocessing).
+
+If you'd like to reproduce the creation of the dataset, you can check [my own fork](https://github.com/marquesafonso/harem_preprocessing) from which this dataset was created.
+
+You may find the authors and relevant work of this dataset in the citations section below. All credit is theirs.
+
+
+## Citations
+
+@inproceedings{freitas-etal-2010-second,
+    title = "Second {HAREM}: Advancing the State of the Art of Named Entity Recognition in {P}ortuguese",
+    author = "Freitas, Cl{\'a}udia  and
+      Mota, Cristina  and
+      Santos, Diana  and
+      Oliveira, Hugo Gon{\c{c}}alo  and
+      Carvalho, Paula",
+    booktitle = "Proceedings of the Seventh International Conference on Language Resources and Evaluation ({LREC}'10)",
+    month = may,
+    year = "2010",
+    address = "Valletta, Malta",
+    publisher = "European Language Resources Association (ELRA)",
+    url = "http://www.lrec-conf.org/proceedings/lrec2010/pdf/412_Paper.pdf"
+}
+
+@misc{fabiocapsouza2020,
+  author = {fabiocapsouza},
+  title = {harem_preprocessing},
+  year = {2020},
+  publisher = {GitHub},
+  journal = {GitHub repository},
+  howpublished = {\url{https://github.com/fabiocapsouza/harem_preprocessing}},
+  commit = {30083a542390094d84ec45116085ab71ceb1442c}
+}