“…(See, for instance, Apté, Damerau, & Weiss (1994), Biebricher et al (1988), Cohen & Singer (1996), Field (1975), Fuhr & Pfeifer (1994), Koller & Sahami (1997), Lewis & Ringuette (1994), Moulinier, Raškinis, & Ganascia (1996), Ng, Goh, & Low (1997) and Yang (1994)). It would be impossible for us to compare our algorithms to all of the previous methods.…”