Once the minimum number of index entries is determined a grid can be partitioned into {TAIL ~ the appropriate number} of grid cells to support {HEAD ~ efficient grid indexing} 
Once the minimum number of index entries is determined a grid can be partitioned into { TAIL ~ the appropriate number } of grid cells to support { HEAD ~ efficient grid indexing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD