7.2 Comparison with Baseline
swers in the subsequent answer extraction step if
the passages returned during passage retrieval do
As pointed out in Section 2 there is a strong tra-
not contain the answer in the first place. This also
dition of using dependency paths in QA. Many
holds true in our case: the patterns cannot be ex-
relevant papers describe algorithms that analyze
pected to identify a correct answer if none of the
a question’s grammatical structure and expect
sentences used as input contains the correct an-
to find a similar structure in valid answer sen-
swer. We therefore use two different evaluation
tences, e.g. (Attardi et al., 2001), (Cui et al., 2005)
sets to evaluate our algorithm:
or (Bouma et al., 2005) to name just a few. As
already pointed out, a major contribution of our
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