The system operator will most likely determine the type of {HEAD ~ information} to be kept on {TAIL ~ the shadow ledger} 
to be kept on
The system operator will most likely determine the type of { HEAD ~ information } to be kept on { TAIL ~ the shadow ledger }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL