{HEAD ~ The method} is applicable to {TAIL ~ the formation} of single crystals for any clathrate I or clathrate II structure 
is applicable to
{ HEAD ~ The method } is applicable to { TAIL ~ the formation } of single crystals for any clathrate I or clathrate II structure
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH