Over the years, different methods for SIR have been proposed (Krovetz and Croft, 1992;Voorhees, 1993;Mandala et al., 1998;Gonzalo et al., 1999;Kim et al., 2004;Liu et al., 2005a, inter alia).
contrasting results have been reported on the benefits of these techniques: it has been shown that WSD has to be very accurate to benefit Information Retrieval (Sanderson, 1994) -a result that was later debated (Gonzalo et al., 1999;Stokoe et al., 2003).