These results may be based on semantic considerations, such as linguistics or philology, which explains why such engines are often referred to as semantic search engines. Prof. E. Young. Sophia Search Home Page. True Knowledge - the internet answer engine. SenseBot - semantic search engine that finds sense on the Web. Lexxe Search Engine - Home page. Swoogle Semantic Web Search Engine. Factbites: Where results make sense. Opinion Crawl - sentiment analysis tool for the Web and social media. Cognition :: Giving Technologies New Meaning. SenseBot - semantic search engine that finds sense on the Web. Hakia.com. Wolfram|Alpha—Computational Knowledge Engine.