{HEAD ~ The marketplaces} stored in {TAIL ~ the information database} may be either pre defined or user defined 
stored in
{ HEAD ~ The marketplaces } stored in { TAIL ~ the information database } may be either pre defined or user defined
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH