Add parquet file description

README.md

@@ -43,6 +43,13 @@ Two separate txt files are provided with the sentences sorted in the same order:
 - nos_all.gl: contains the authentic Galician sentences.
 
 
+The dataset is additionally provided in parquet format: nos_all.parquet.
+
+The parquet file contains two columns of parallel text obtained from the two original text files. 
+Each row in the file represents a pair of parallel sentences in the two languages of the dataset.
+
+
+
 ### Data Fields
 
 [N/A]