{TAIL ~ The second semiconductor layer} has {HEAD ~ a higher resistivity} than the first and third semiconductor layers 
{ TAIL ~ The second semiconductor layer } has { HEAD ~ a higher resistivity } than the first and third semiconductor layers
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH