Table 2 shows that PARENT-ANCESTOR METHOD is more accurate than the other two   Kudo and Matsumoto (2002) 89.19% 46.64% Proposed method 89.54% 47.38% Sekine (2000) 87.20% 40.76% Kudo and Matsumoto (2000) 89.09% 46.17% Kudo and Matsumoto (2002) 89.29% 47.53% Sassano (2004) 89.56% 48.35% w/o Rich Sassano (2004)  methods.
the accuracy of dependency analysis improves by utilizing the redundant information.