Update README.md

documentation update.

README.md

@@ -8,7 +8,7 @@ This is a gold-standard benchmark dataset for sentence alignment, between Sinhal
 | ITN           | https://www.newsfirst.lk    |
 | Newsfirst     | https://www.itnnews.lk      |
 
-The aligned documents have been manually annotated.
+The aligned sentences have been manually annotated.
 
 ### **Dataset**
 The folder structure for each news source is as follows.
@@ -35,7 +35,7 @@ ta-en
 si-ta
 ```
 
-Sinhala/English/Tamil - contain the aligned documents in the two languages with respect to the news source (army/hiru/itn/newsfirst)<br/>
+Sinhala/English/Tamil - contain the aligned documents in the two languages with respect to the news source. (army/hiru/itn/newsfirst) Aligned documents contain the same ID.<br/>
 army.si-en - golden aligned sentence alignment. Each sentence is referenced according to the languageprefix_fileid_sentenceId. <br/>