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