In particular, system 301 may provide {HEAD ~ several grouping operators} that analyze and consolidate {TAIL ~ data} from multiple streams 
In particular , system 301 may provide { HEAD ~ several grouping operators } that analyze and consolidate { TAIL ~ data } from multiple streams
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH