title: Labeled dataset of product review spam
body: <p>I've edited my question below after comment from @Tchotchke:
  I am trying to train an NLP model to classify fake and authentic product reviews. For the training, I need a labeled dataset of such reviews. There are product review datasets published by researchers, but they aren't labeled. And some datasets (like the one in <a href="https://stackoverflow.com/questions/10588912/fake-reviews-datasets">Fake reviews datasets</a>) is for hotel reviews, and thus does not represent the wide range of language features that can exist for reviews of products like shoes, clothes, furniture, electronics, etc. that are sold on typical shopping portals like Amazon, Walmart, etc. Can someone please suggest a way to generate such a labeled dataset rather quickly or find one already available?</p>