i'm sorry, i'm john crouse, dhr. it depends on the examination that we administer, but typically there may be hundreds of scoring elements in the examination, sometimes thousands of scoring elements when you factor in ever looking at the scores or the ratings of multiple raters, so did that answer your question. >> no, it doesn't. >> how do we adjust for -- >> how do you adjust for any problems with the test in advance of the administration of the test? >> we have -- we convene groups, we call them subject experts to relevant the examination and we have a separate group involved in the development of the answer key and we try to make that group as representative as possible. so they're the one -- >> representative by -- expertise, race, age. >> their level. they're betting the test material and determining if it's appropriate or not. if it's not, we don't include it. >> what if one say it's appropriate and two say it's inappropriate. >> if they can't agree, we should throw it out. but generally we try to get consensu