I am testing WordAi Turing. The WordAi is very good software, but the rewritten articles have many sentences, which are not really unique (short sentences; sentences with rare, complicated words). I try testing with random news portal, pdf ebooks, magazines... How to find right source for WordAi? May I search with readibility test (Flesch-Kincaid, Gunning Frog, SMOG)? Or other way to find easily rewriteble texts?