more work on README

README.md

@@ -56,6 +56,24 @@ parse -lang=Eng "a unital quasigroup is called a loop" | vt -view=zathura
 
 Note that a png file is generated in the case of a single parse tree (which might require a different viewer).
 
+Random sentences can be created in the following way:
+
+```
+i src/MgfEng.gf
+gr -number=2 | l -lang=Eng
+```
+
+which gives for example the output
+
+```
+a converse $ mrow( mi( A ) mo( > ) mn( 1 ) ) $ is called a perturbation
+there isn't no issue
+```
+
+In my version, there seems to be a bug and the call doesn't always return.
+If you want to learn more about GF, we recommend checking out the [tutorial](https://www.grammaticalframework.org/doc/tutorial/gf-tutorial.html).
+
+
 Preprocessing
 ===