Update README.md

README.md

@@ -41,6 +41,6 @@ All FETV data are all available in the file `fetv_data.json`. Each line is a dat
 * "video_url" is the url link of the reference video.
 
 ### Dataset Statistics
-FETV contains 619 text prompts. The data distributions over different categories are as follows
+FETV contains 619 text prompts. The data distributions over different categories are as follows (the numbers over categories do not sum up to 619 because a data instance can belong to multiple categories)
 ![](./Figures/content_attribute_statistics.png)
 ![](./Figures/complexity_statistics.png)