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