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