Update README.md

README.md

@@ -21,7 +21,9 @@ These 2 datasets contain no patient identifying information are openly available
 
 
 
-Additionally, for the IR task, other feature representations of the documents have been created, each of these has exactly 374648 lines of corresponding data:
+Additionally, for the IR task, other feature representations of the unlabelled documents have been created.
+
+Each of these has exactly 374648 lines of corresponding data:
 
 `doc_texts.csv`
 - texts extracted from processed documents using several fields including eligbility min and max age, and eligbility criteria, structured as this example from NCT00000102: