accept {HEAD ~ data} received from {TAIL ~ the first data enterer} into the system if the data are entered in a format compliant with a first set of rules 
received from
accept { HEAD ~ data } received from { TAIL ~ the first data enterer } into the system if the data are entered in a format compliant with a first set of rules
OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH