'Prover9 theorem prover grammar

I've been searching for the grammar for this theorem prover but I found none. There are only bits and pieces on their site. Does anyone by any chance in in possesion of the grammar for this thing or is able to tell me where I can look for it



Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source