{TAIL ~ The transistor} has {HEAD ~ at least one semiconducting carbon nanotube} that is electrically coupled between the source and drain electrodes 
{ TAIL ~ The transistor } has { HEAD ~ at least one semiconducting carbon nanotube } that is electrically coupled between the source and drain electrodes
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH