Water from {HEAD ~ the pool} of water in {TAIL ~ the indoor institution} is filtered and transferred to the sterilizing chamber 
Water from { HEAD ~ the pool } of water in { TAIL ~ the indoor institution } is filtered and transferred to the sterilizing chamber
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH