Update README.md

README.md

@@ -48,7 +48,8 @@ This step requires access to mysql server or installed locally.
 It can be loaded using shell command:
 
     $ mysql -e 'CREATE SCHEMA wordnet_new' # For maintaining multiple versions.
-    $ mysql -D wordnet_new < wordnet-work.LATEST.sql.gz
+    $ atool -x wordnet-work.LATEST.sql.gz  # Unpack dump
+    $ mysql -D wordnet_new < wordnet-work.LATEST.sql
 
 It is then recommended to run `clean_wndb.sql` script to remove any mistakes
 in an unlikely case that the dump contains some, such as invalid enum values