Threshold determining {HEAD ~ means} determines {TAIL ~ a velocity threshold value} functionally related to the crash displacement value 
determines
Threshold determining { HEAD ~ means } determines { TAIL ~ a velocity threshold value } functionally related to the crash displacement value
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH