The invention identifies a plurality of {HEAD ~ articles} from which information is to be extracted and a plurality of {TAIL ~ information extractors} for extracting the information from the articles 
The invention identifies a plurality of { HEAD ~ articles } from which information is to be extracted and a plurality of { TAIL ~ information extractors } for extracting the information from the articles
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH