“…The average length of the resulting queries is 2.75. Such a short length corresponds to that of web search queries: 2-3 terms on average in most studies Bendersky and Croft, 2009;Arampatzis and Kamps, 2008;Barr et al, 2008;Jansen et al, 2000;Kirsch, 1998). Moreover, title fields consist mainly of noun phrases, as in our sample, which also agrees with the nature of web queries, noun phrases in the main (Barr et al, 2008;Kirsch, 1998).…”