... 1048–1056,Suntec, Singapore, 2-7 August 2009.c2009 ACL and AFNLPWord or Phrase?Learning Which Unit to Stress for Information Retrieval∗Young-In Song†and Jung-Tae Lee‡and Hae-Chang Rim‡†Microsoft ... performance of information retrieval models?Let us consider a search query ‘World Bank Crit-icism’, which has the following phrases: ‘world∗This work was done while Young-In Song was with theDept. ... could be paid to the lat-ter ‘bank criticism’, because there may be alter-nate expressions, of which the meaning is still pre-served, that could possibly occur in relevant docu-ments. However,...