README.md, short info on dataset

README.md

@@ -31,6 +31,8 @@ dataset_info:
 # Dataset Card for Dataset _tla-demotic-v18-premium_
 
 <!-- Provide a quick summary of the dataset. -->
+This data set contains demotic sentences in `transliteration`, with `lemmatization`, with POS `glossing` and with a German `translation`. 
+The data comes from the database of the [Thesaurus Linguae Agegyptiae](https://thesaurus-linguae-aegyptiae.de), corpus version 18, and contains only fully intact, unambiguously readable sentences (15,134 of 31,156 sentences), adjusted for philological and editorial markup.
 
 ## Dataset Details