{HEAD ~ Graphene} is {TAIL ~ a single atomic layer} of graphite and as such is expected to be a zero gap semiconductor 
is
{ HEAD ~ Graphene } is { TAIL ~ a single atomic layer } of graphite and as such is expected to be a zero gap semiconductor
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH