{HEAD ~ The mixture} includes {TAIL ~ a precursor} of a desired material within a supercritical fluid 
includes
{ HEAD ~ The mixture } includes { TAIL ~ a precursor } of a desired material within a supercritical fluid
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH