updated dataset card

README.md

@@ -1,3 +1,37 @@
 ---
 license: gfdl
+language:
+- en
 ---
+
+# Dataset Card for D&D 5th Edition Spells
+
+### Dataset Description
+
+<!-- Provide a longer summary of what this dataset is. -->
+
+This dataset contains spells that were obtained by the Homebrew section of the [D&D Wiki](https://www.dandwiki.com/wiki/Main_Page).
+The spells were filtered and processed according to the following procedure:
+
+- Removed spells not having one of the following tags: *Level*, *School*, *Duration*, *Casting time*, *Range*
+- Removed spells not correctly specifying the required components (that is "V", "S" or "M")
+- Removed spells associated to non-official classes
+- Removed "votes" section that could be present in the spell description
+
+The spells were then formatted following this format:
+
+```
+Name: 
+Level: 
+School: 
+Classes: 
+Casting time: 
+Range: 
+Duration:
+Components: [If no components are required, then this field has a None value]
+Material cost: [If there is no "M" character in the Components field, then this field is skipped]
+Description:
+```
+
+- **Language(s) (NLP):** English
+- **License:** gfdl