Effect of combining different Web search engines on Web question-answering
نویسندگان
چکیده
We have several different commercial Web search engines that are available. It is expected that the combination of the results from different Web search engines has some impact on the accuracy of questionanswering (QA) for Web documents, because the search results are not identical and the combination increases the variety of information source. However, as far as we know, there are no studies on the effect of combining different Web search engines on QA. In this paper, we examined the effect of the combination on QA. We investigated three different methods to combine search results from different search engines in the process of QA. The first one is a conventional method that straightforwardly merges search results from different search engines, then, feeds the unified search result into one QA engine. On the other hand, the second one and third one are our proposal methods that feed each search result from individual search engine to a QA engine separately, then merge the answer candidates. The experimental result showed that the methods that merge the answer candidates after QA are more effective than the method that merges the search results before QA.
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