determining {TAIL ~ a first negative transition temporal relationship} of the first negative transition to {HEAD ~ a first reference negative transition time}; and 
determining { TAIL ~ a first negative transition temporal relationship } of the first negative transition to { HEAD ~ a first reference negative transition time } ; and
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH