updated readme

README.md

@@ -13,9 +13,15 @@ Download
 
 [Here](https://dl.dropboxusercontent.com/u/20957649/wordnet/wordnet.json.gz).
 
-Documentation
--------------
+File Structure
+--------------
 
 This is a [WordNet](https://godoc.org/github.com/fluhus/gostuff/nlp/wordnet#WordNet)
 struct.
 
+Go API
+------
+
+If you are working with Go, I encourage you to skip this JSON file and work
+directly with the [Go API](https://godoc.org/github.com/fluhus/gostuff/nlp/wordnet)
+