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