It is understood that {TAIL ~ such operational relationships} may also include {HEAD ~ any} of the stored historical data described herein 
It is understood that { TAIL ~ such operational relationships } may also include { HEAD ~ any } of the stored historical data described herein
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH