Over time, the English Wikipedia and some other Wikipedias gradually restricted modifications. For example, in the English Wikipedia and some other language editions, only registered users may create a new article. On the English Wikipedia and some others, some particularly sensitive and/or vandalism-prone pages are now “protected” to some degree. A frequently vandalized article can be semi-protected, meaning that only certain editors are able to modify it. A particularly contentious article may be locked so that only administrators are able to make changes.