{TAIL ~ The system} includes {HEAD ~ an indication mechanism} to indicate that the information file has sufficiently changed 
{ TAIL ~ The system } includes { HEAD ~ an indication mechanism } to indicate that the information file has sufficiently changed
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH