{HEAD ~ Data sets} from {TAIL ~ the online transaction processing system} may be received into the data warehouse, where the received data sets are filtered 
{ HEAD ~ Data sets } from { TAIL ~ the online transaction processing system } may be received into the data warehouse , where the received data sets are filtered
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH