{HEAD ~ The sorting installation} establishes {TAIL ~ which possible feature values} the measuring device has actually measured at least once 
{ HEAD ~ The sorting installation } establishes { TAIL ~ which possible feature values } the measuring device has actually measured at least once
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH