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Motivated by the needs of semantic search and retrieval of multimedia contents, operating directly on the video based annotations can be thought as a reasonable way for meeting these needs as video is a common standard providing a wide multimedia content description schema. Raw data and lowlevel features alone are not satisfactory to fulfil the user's requirements; that means, a deeper understanding of the content at the semantic level is necessary. A semantic content extraction system thatdoi:10.5120/ijca2015906630 fatcat:ltsacsrxbbfajocborjfkapa7m