hi bobrayner please see wikipedia copyright violations material copied from sources that are not public domain for example pasteur fr britannica and bbc news or compatibly licensed without the permission of the copyright holder unless brief quotation used in accordance with non free content policy and guideline is likely to be a copyright violation for instance in of open sea fisheries the current text needs to be rewritten or deleted even inserting text copied with some changes can be a copyright violation if there's substantial linguistic similarity in creative language or structure wikipedia faq copyright you can use the facts but unless they are presented without creativity such as an alphabetical phone directory you may need to reorganize as well as restate them to avoid substantial similarity infringement