Search engines usually employ two techniques to get the most appropriate results: retrieve and read Question Answering (QA) approach, or a Knowledge Base QA (KB) approach. These two, however, have limitations—multi-hop question answering. In short, the challenge is in answering questions where the search engine has to scrape from multiple documents.
Read more: https://analyticsindiamag.com/nlp-language-models-reasoning/
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