receive first additional data from a second data enterer, {HEAD ~ the first additional data} being related to {TAIL ~ the data} received from the first data enterer 
related to
receive first additional data from a second data enterer , { HEAD ~ the first additional data } being related to { TAIL ~ the data } received from the first data enterer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH