Added bnf when adding a new concept + Started logging filtering

evaluators/ConceptEvaluator.py

@@ -18,13 +18,12 @@ class ConceptEvaluator(OneReturnValueEvaluator):
 
     def matches(self, context, return_value):
         return return_value.status and \
-               return_value.who.startswith(BaseParser.PREFIX) and \
-               isinstance(return_value.value, Concept) and \
-               not isinstance(return_value.value, ParserResultConcept)  # because there are specific evaluators
+               isinstance(return_value.value, ParserResultConcept) and \
+               isinstance(return_value.value.value, Concept)
 
     def eval(self, context, return_value):
         sheerka = context.sheerka
-        concept = return_value.value
+        concept = return_value.value.value
 
         # pre condition should already be validated by the parser.
         # It's a mandatory condition for the concept before it can be recognized