Optionally, {TAIL ~ the reader} may also retrieve {HEAD ~ an ID} which may be a tag identifier, an item identifier, or both 
Optionally , { TAIL ~ the reader } may also retrieve { HEAD ~ an ID } which may be a tag identifier , an item identifier , or both
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH