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