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