Thank you for uploading File:Social Semantic- EMWCon May 25 2016.pdf. However, it currently is missing information on its copyright and licensing status. Wikimedia Foundation, who kindly hosts MediaWiki.org, takes copyright law very seriously. It may be deleted soon, unless we can verify that it has an acceptable license status and a verifiable source. Please add this information by editing the image description page. The page on copyright tags may help you to find the correct tag to use for your file.