Update README.md

README.md

@@ -18,7 +18,7 @@ This dataset contains more than 140,000 English books (~ xx billion words) digit
 
 ## Curation method
 
-The dataset was curated using the [LoC JSON API](https://www.loc.gov/apis/json-and-yaml/).
+The dataset was curated using the [LoC JSON API](https://www.loc.gov/apis/json-and-yaml/) and filtering the Selected Digitized Books collection for English books.
 
 ## Dataset summary
 
@@ -34,7 +34,7 @@ The book texts are accompanied by basic metadata fields such as title, author an
 
 ## Languages
 
-Every book in this collection has been classified as having English as its primary language.
+Every book in this dataset has been classified as having English as its primary language by the LoC.
 
 ## OCR