@Ress - You will probably be best off checking their site to see whether the content is copyrighted. If the content is copyrighted then it may be a good idea to contact the site/organization and ask for permission to upload the lessons on LingQ.
Usually newspaper articles are copyrighted. Sometimes they are under a CC-License. Unfortunately this is often a “No-commercial” license, and we cannot use it on LingQ. To ask for permission is the best way. Good luck.
@spatterson - Yes, of course You’re free to import and study anything privately, though only copyright free content or content used with permission should be shared in the Library.