The automatic generator includes {TAIL ~ a specification tool} for specifying a set of {HEAD ~ block descriptions representative} of specified portions of a database 
The automatic generator includes { TAIL ~ a specification tool } for specifying a set of { HEAD ~ block descriptions representative } of specified portions of a database
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH