{HEAD ~ Information} extracted by {TAIL ~ information extractors} from the articles is stored in the information store 
extracted by
{ HEAD ~ Information } extracted by { TAIL ~ information extractors } from the articles is stored in the information store
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH