“Reproduce” in this context reads like “copy/republish”, which would not be a derivative work.
Yes, if it's an exact copy, but I don't know if their system is actually presenting entire articles, or just fragments (copyrightable, perhaps) and perhaps mixing them with other text.
Yes, if it's an exact copy, but I don't know if their system is actually presenting entire articles, or just fragments (copyrightable, perhaps) and perhaps mixing them with other text.