Clojurians Log v2

I am trying to parse a grammar that I would think would not be too difficult for Instaparse, I have looked at the tutorials and googled but I can actually find very few examples of instaparse grammars. The format I am parsing is as follows. Does anyone have an an example of something similar that would help me get a handle on this: namespace org.acme@1.0.0 concept address { o String street } concept person { o String name o Integer age o Address address optional }