Sets of {HEAD ~ symptom indicators} and extreme action indicators are also driven by {TAIL ~ the computer} 
Sets of { HEAD ~ symptom indicators } and extreme action indicators are also driven by { TAIL ~ the computer }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL