{HEAD ~ Access} to {TAIL ~ content} is enabled based on user manipulation of the configured user interface 
to
{ HEAD ~ Access } to { TAIL ~ content } is enabled based on user manipulation of the configured user interface
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH