In particular, the notification can relate to the acceptance of {HEAD ~ the delegation} for {TAIL ~ an instant messaging communication} and session 
for
In particular , the notification can relate to the acceptance of { HEAD ~ the delegation } for { TAIL ~ an instant messaging communication } and session
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH