The hub may provide {TAIL ~ the availability information} based on information provided by each communication site and stored in {HEAD ~ the hub} 
The hub may provide { TAIL ~ the availability information } based on information provided by each communication site and stored in { HEAD ~ the hub }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD