{HEAD ~ An impact force measurement} associated with {TAIL ~ a test} of a moveable barrier operator is obtained 
associated with
{ HEAD ~ An impact force measurement } associated with { TAIL ~ a test } of a moveable barrier operator is obtained
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH