{TAIL ~ An apparatus} for separating a substance from {HEAD ~ a liquid} within which said substance is contained comprising: 
{ TAIL ~ An apparatus } for separating a substance from { HEAD ~ a liquid } within which said substance is contained comprising :
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH