Check GET value with htaccess?

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http://serverfault.com – I need help with setting up a rule inside htaccess that does the following, whenever the requested URL contains keyword "love" --> Redirect the user to another URL or maby show a 404 page? Clearifing a bit more --> If someone tries to access this URL --> www.domain.com/love or www.domain.com/?love or any URL that contains the word love should be redirected to a 404 page. appreciate your help. (HowTos)