{HEAD ~ The islands} have {TAIL ~ a conductivity} that is substantially greater than the conductivity of the resistive layer 
{ HEAD ~ The islands } have { TAIL ~ a conductivity } that is substantially greater than the conductivity of the resistive layer
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH