sentence: Vandalism is a very bad problem.
sentences_before: Vandalism' is making changes to Wikipedia content so that it becomes incorrect or does not make sense. This also includes removing content for no reason.
sentences_after: People who vandalize may be blocked so they are no longer able to make changes. Test edits are usually not vandalism. Sometimes, vandals from the English Wikipedia will come here to vandalize. This is called cross-wiki vandalism.
concept_name: vandalism
headings: Wikipedia:Vandalism