Commonly used techniques to gain information in web mining include, $\_\_\_\_\_\_\_\_,\_\_\_\_\_\_\_\_,$ and $\_\_\_\_\_\_\_\_.$

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Web Content Mining $($WCM$)$Web Content Mining $($WCM$)$

Web Structure Mining $($WSM$)$Web Structure Mining $($WSM$)$

Web Usage Mining $($WUM$)$Web Usage Mining $($WUM$)$

Web Techniques Mining $($WTM$)$Web Techniques Mining $($WTM$)$