Thus, not only does the data identify whether a selected event occurred, but the data also indicates {TAIL ~ an exact sequence} of {HEAD ~ the order} that the events occurred 
Thus , not only does the data identify whether a selected event occurred , but the data also indicates { TAIL ~ an exact sequence } of { HEAD ~ the order } that the events occurred
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH