The device 1, wherein {TAIL ~ said photoreceiver} is {HEAD ~ a CdS photoresistor} 
The device 1 , wherein { TAIL ~ said photoreceiver } is { HEAD ~ a CdS photoresistor }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD