When execution of the communication task can be extended, {HEAD ~ the communication apparatus} extends execution of the communication task to {TAIL ~ a later time} 
When execution of the communication task can be extended , { HEAD ~ the communication apparatus } extends execution of the communication task to { TAIL ~ a later time }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL