discovering predicate name

From: joss b (jossblowing_at_yahoo.co.uk)
Date: 03/14/04 

Date: 13 Mar 2004 16:57:28 -0800

Hi there,

Please excuse the dodgy terminology here, I'm pretty new to these
prolog and logic shores and just beginning :) I've been playing around
with gprolog to make a little and basic expert system. I've looked at
quite a few implementations already, but they shoot far ahead with
some natural(ish) language processing. I'm passing around predicates
in my rules, such like gender(male) and eyecolor(red). I'm wondering
if there's anyway I can check these predicates in order to taylor the
user output ? Say, rather than the system prompting,"is the
eyecolor(red)?", I would be able to discover the "eyecolor" bit and
change the language to - "what color are the eyes?".

hopefully someone would be good enough to shed some light for me?

thanks a million! -joss