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The emergence of multiple web pages day by day leads to the development of the semantic web technology. A World Wide Web Consortium (W3C) standard for storing semantic web data is the resource description framework (RDF). To enhance the efficiency in the execution time for querying large RDF graphs, the evolving metaheuristic algorithms become an alternate to the traditional query optimization methods. This paper focuses on the problem of query optimization of semantic web data. An efficientdoi:10.1155/2014/727658 pmid:25215330 pmcid:PMC4158119 fatcat:tuo4vc3hjrch3g7n3oarohqnku