Might be far better to post a stripped down copy of the db (compacted and zipped) to cut to the chase. It seems to me that something is amiss in the design because you answer a question on the form which ought to trigger a relationship between the answer and this code you want to use. Not sure if what's really needed is for that relationship to identify what is yes, what is no, or both. It may be that the related field should be an integer (-1 or 0 values) or a yes/no field as some prefer.
BTW, it isn't clear to me if what you want is RC1, RC2, etc. or the rest of the verbiage as well.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.