{HEAD ~ A display system} having {TAIL ~ a plurality} of wearable displays, the display system comprising: 
having
{ HEAD ~ A display system } having { TAIL ~ a plurality } of wearable displays , the display system comprising :
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH