Accordingly, each database can compare their respective benefit data with the benefit data of {HEAD ~ the neediest database} on {TAIL ~ the system} 
on
Accordingly , each database can compare their respective benefit data with the benefit data of { HEAD ~ the neediest database } on { TAIL ~ the system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL